diff --git a/CHANGELOG.md b/CHANGELOG.md
index a68d59f..b90635c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 ## Changelog
 
+### 1.1.6 (2023-12-08)
+-   Modified sizes of butterflies so they're closer to reality
+-   Some butterflies will now move faster
+-   Butterflies now have varying rarities
+-   Caterpillars, chrysalises, and butterflies now have varying lifespans
+
 ### 1.1.5  (2023-11-30)
 -   Snow.
 
diff --git a/README.md b/README.md
index ee2e0bd..6a40380 100644
--- a/README.md
+++ b/README.md
@@ -1,13 +1,16 @@
 # Butterflies
- This mod adds butterflies with a full life cycle to the world of Minecraft. It
- features 16 butterfly species, mostly based on real-life butterflies but a
- couple of them are purely fantasy butterflies.
-
- Butterflies will lay eggs in leaves if they get close to them, and if a player
- collects these eggs they can plant them in other leaf blocks. The eggs will
- eventually hatch into caterpillars. After living on the leaves for a short
- time, a caterpillar will eventually build a chrysalis. These will then hatch
- into new butterflies within the world.
+This mod adds butterflies with a full life cycle to the world of Minecraft. It
+features 16 butterfly species, mostly based on real-life butterflies but a
+couple of them are purely fantasy butterflies.
+
+Butterflies will lay eggs in leaves if they get close to them, and if a player
+collects these eggs they can plant them in other leaf blocks. The eggs will
+eventually hatch into caterpillars. After living on the leaves for a short
+time, a caterpillar will eventually build a chrysalis. These will then hatch
+into new butterflies within the world.
+
+Each butterfly species has it's own size, speed, rarity and lifespan. Some will
+be larger, some will move faster, some will live longer than others.
 
 Butterflies can be caught or released using a butterfly net. Once caught, they
 can be bottled and placed in the world as decorative objects. 
diff --git a/gradle.properties b/gradle.properties
index 1fe53ae..df34da2 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -48,7 +48,7 @@ mod_name=Butterfly Mod
 # The license of the mod. Review your options at https://choosealicense.com/. All Rights Reserved is the default.
 mod_license=All Rights Reserved
 # The mod version. See https://semver.org/
-mod_version=1.1.5
+mod_version=1.1.6
 # The group ID for the mod. It is only important when publishing as an artifact to a Maven repository.
 # This should match the base package used for the mod sources.
 # See https://maven.apache.org/guides/mini/guide-naming-conventions.html
diff --git a/src/main/java/com/bokmcdok/butterflies/world/ButterflyData.java b/src/main/java/com/bokmcdok/butterflies/world/ButterflyData.java
index a66a5bc..ac68d6c 100644
--- a/src/main/java/com/bokmcdok/butterflies/world/ButterflyData.java
+++ b/src/main/java/com/bokmcdok/butterflies/world/ButterflyData.java
@@ -18,10 +18,57 @@ public enum Size {
         LARGE
     }
 
+    // Represents the speed of a butterfly.
+    public enum Speed {
+        MODERATE,
+        FAST
+    }
+
+    // Constants representing the base life spans of each butterfly cycle.
+    public static int LIFESPAN_SHORT = 24000 * 2;
+    public static int LIFESPAN_MEDIUM = 24000 * 4;
+    public static int LIFESPAN_LONG = 24000 * 7;
+
     //  Helper maps.
     private static final Map<String, Integer> ENTITY_ID_TO_INDEX_MAP = new HashMap<>();
-    private static final Map<Integer, String> INDEX_TO_ENTITY_ID_MAP = new HashMap<>();
-    private static final Map<Integer, Size> BUTTERFLY_SIZES = new HashMap<>();
+    private static final Map<Integer, Entry> BUTTERFLY_ENTRIES = new HashMap<>();
+
+    /**
+     * Class to hold all the data for a specific butterfly.
+     */
+    public static class Entry {
+        public final String entityId;
+        public final Size size;
+        public final Speed speed;
+
+        public final int caterpillarLifespan;
+        public final int chrysalisLifespan;
+        public final int butterflyLifespan;
+
+        /**
+         * Construction
+         * @param entityId The id of the butterfly species.
+         * @param size The size of the butterfly.
+         * @param speed The speed of the butterfly.
+         * @param caterpillarLifespan How long it remains in the caterpillar stage.
+         * @param chrysalisLifespan How long it takes for a chrysalis to hatch.
+         * @param butterflyLifespan How long it lives as a butterfly.
+         */
+        private Entry(String entityId,
+                      Size size,
+                      Speed speed,
+                      int caterpillarLifespan,
+                      int chrysalisLifespan,
+                      int butterflyLifespan) {
+            this.entityId = entityId;
+            this.size = size;
+            this.speed = speed;
+
+            this.caterpillarLifespan = caterpillarLifespan * 2;
+            this.chrysalisLifespan = chrysalisLifespan;
+            this.butterflyLifespan = butterflyLifespan * 2;
+        }
+    }
 
     /**
      * Create new butterfly data.
@@ -30,30 +77,56 @@ public enum Size {
      *                locations.
      * @param size The size of the butterfly.
      */
-    private static void addButterfly(int index, String species, Size size)
+    private static void addButterfly(int index,
+                                     String species,
+                                     Size size,
+                                     Speed speed,
+                                     int caterpillarLifespan,
+                                     int chrysalisLifespan,
+                                     int butterflyLifespan)
     {
         ENTITY_ID_TO_INDEX_MAP.put(species, index);
-        INDEX_TO_ENTITY_ID_MAP.put(index, species);
-        BUTTERFLY_SIZES.put(index, size);
+        BUTTERFLY_ENTRIES.put(index, new Entry(species,
+                                               size,
+                                               speed,
+                                               caterpillarLifespan,
+                                               chrysalisLifespan,
+                                               butterflyLifespan));
     }
 
     static {
-        addButterfly(0, "admiral", Size.MEDIUM);
-        addButterfly(1, "buckeye", Size.MEDIUM);
-        addButterfly(2, "cabbage", Size.LARGE);
-        addButterfly(3, "chalkhill", Size.SMALL);
-        addButterfly(4, "clipper", Size.LARGE);
-        addButterfly(5, "common", Size.MEDIUM);
-        addButterfly(6, "emperor", Size.LARGE);
-        addButterfly(7, "forester", Size.MEDIUM);
-        addButterfly(8, "glasswing", Size.MEDIUM);
-        addButterfly(9, "hairstreak", Size.MEDIUM);
-        addButterfly(10, "heath", Size.SMALL);
-        addButterfly(11, "longwing", Size.SMALL);
-        addButterfly(12, "monarch", Size.MEDIUM);
-        addButterfly(13, "morpho", Size.LARGE);
-        addButterfly(14, "rainbow", Size.SMALL);
-        addButterfly(15, "swallowtail", Size.LARGE);
+        addButterfly(0, "admiral", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_MEDIUM, LIFESPAN_MEDIUM);
+        addButterfly(1, "buckeye", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_MEDIUM);
+        addButterfly(2, "cabbage", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_SHORT);
+        addButterfly(3, "chalkhill", Size.SMALL, Speed.FAST,
+                LIFESPAN_MEDIUM, LIFESPAN_MEDIUM, LIFESPAN_MEDIUM);
+        addButterfly(4, "clipper", Size.LARGE, Speed.FAST,
+                LIFESPAN_MEDIUM, LIFESPAN_LONG, LIFESPAN_MEDIUM);
+        addButterfly(5, "common", Size.SMALL, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_MEDIUM);
+        addButterfly(6, "emperor", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_MEDIUM, LIFESPAN_SHORT, LIFESPAN_MEDIUM);
+        addButterfly(7, "forester", Size.SMALL, Speed.MODERATE,
+                LIFESPAN_LONG, LIFESPAN_MEDIUM, LIFESPAN_MEDIUM);
+        addButterfly(8, "glasswing", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_LONG);
+        addButterfly(9, "hairstreak", Size.SMALL, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_MEDIUM, LIFESPAN_SHORT);
+        addButterfly(10, "heath", Size.SMALL, Speed.MODERATE,
+                LIFESPAN_LONG, LIFESPAN_MEDIUM, LIFESPAN_LONG);
+        addButterfly(11, "longwing", Size.MEDIUM, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_LONG);
+        addButterfly(12, "monarch", Size.LARGE, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_SHORT, LIFESPAN_MEDIUM);
+        addButterfly(13, "morpho", Size.LARGE, Speed.MODERATE,
+                LIFESPAN_MEDIUM, LIFESPAN_SHORT, LIFESPAN_MEDIUM);
+        addButterfly(14, "rainbow", Size.SMALL, Speed.FAST,
+                LIFESPAN_MEDIUM, LIFESPAN_MEDIUM, LIFESPAN_MEDIUM);
+        addButterfly(15, "swallowtail", Size.LARGE, Speed.MODERATE,
+                LIFESPAN_SHORT, LIFESPAN_MEDIUM, LIFESPAN_SHORT);
     }
 
     /**
@@ -79,6 +152,19 @@ private static int entityIdToIndex(String entityId) {
         return -1;
     }
 
+    /**
+     * Converts an index to an entity ID.
+     * @param index The index to convert to an entity ID.
+     * @return The entity ID string.
+     */
+    private static String indexToEntityId(int index) {
+        if (BUTTERFLY_ENTRIES.containsKey(index)) {
+            return BUTTERFLY_ENTRIES.get(index).entityId;
+        }
+
+        return null;
+    }
+
     /**
      * Converts a resource location to a butterfly index.
      * @param location The resource location to convert.
@@ -95,8 +181,9 @@ public static int locationToIndex(ResourceLocation location) {
      * @return The resource location of the butterfly.
      */
     public static ResourceLocation indexToButterflyLocation(int index) {
-        if (INDEX_TO_ENTITY_ID_MAP.containsKey(index)) {
-            return new ResourceLocation(ButterfliesMod.MODID, INDEX_TO_ENTITY_ID_MAP.get(index));
+        String entityId = indexToEntityId(index);
+        if (entityId != null) {
+            return new ResourceLocation(ButterfliesMod.MODID, entityId);
         }
 
         return null;
@@ -108,8 +195,9 @@ public static ResourceLocation indexToButterflyLocation(int index) {
      * @return The resource location of the butterfly egg.
      */
     public static ResourceLocation indexToButterflyEggLocation(int index) {
-        if (INDEX_TO_ENTITY_ID_MAP.containsKey(index)) {
-            return new ResourceLocation(ButterfliesMod.MODID, INDEX_TO_ENTITY_ID_MAP.get(index) + "_egg");
+        String entityId = indexToEntityId(index);
+        if (entityId != null) {
+            return new ResourceLocation(ButterfliesMod.MODID, entityId + "_egg");
         }
 
         return null;
@@ -121,8 +209,9 @@ public static ResourceLocation indexToButterflyEggLocation(int index) {
      * @return The resource location of the caterpillar.
      */
     public static ResourceLocation indexToCaterpillarLocation(int index) {
-        if (INDEX_TO_ENTITY_ID_MAP.containsKey(index)) {
-            return new ResourceLocation(ButterfliesMod.MODID, INDEX_TO_ENTITY_ID_MAP.get(index) + "_caterpillar");
+        String entityId = indexToEntityId(index);
+        if (entityId != null) {
+            return new ResourceLocation(ButterfliesMod.MODID, entityId + "_caterpillar");
         }
 
         return null;
@@ -134,23 +223,34 @@ public static ResourceLocation indexToCaterpillarLocation(int index) {
      * @return The resource location of the chrysalis.
      */
     public static ResourceLocation indexToChrysalisLocation(int index) {
-        if (INDEX_TO_ENTITY_ID_MAP.containsKey(index)) {
-            return new ResourceLocation(ButterfliesMod.MODID, INDEX_TO_ENTITY_ID_MAP.get(index) + "_chrysalis");
+        String entityId = indexToEntityId(index);
+        if (entityId != null) {
+            return new ResourceLocation(ButterfliesMod.MODID, entityId + "_chrysalis");
         }
 
         return null;
     }
 
-    public static Size getSize(int index) {
-        if (BUTTERFLY_SIZES.containsKey(index)) {
-            return BUTTERFLY_SIZES.get(index);
+    /**
+     * Get butterfly data by index.
+     * @param index The butterfly index.
+     * @return The butterfly entry.
+     */
+    public static Entry getEntry(int index) {
+        if (BUTTERFLY_ENTRIES.containsKey(index)) {
+            return BUTTERFLY_ENTRIES.get(index);
         }
 
-        return Size.MEDIUM;
+        return null;
     }
 
-    public static Size getSize(ResourceLocation location) {
+    /**
+     * Get butterfly data by resource location.
+     * @param location The resource location of the butterfly.
+     * @return The butterfly entry.
+     */
+    public static Entry getEntry(ResourceLocation location) {
         int index = locationToIndex(location);
-        return getSize(index);
+        return getEntry(index);
     }
 }
diff --git a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Butterfly.java b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Butterfly.java
index e7ef6ac..c987e56 100644
--- a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Butterfly.java
+++ b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Butterfly.java
@@ -1,5 +1,6 @@
 package com.bokmcdok.butterflies.world.entity.animal;
 
+import com.bokmcdok.butterflies.ButterfliesMod;
 import com.bokmcdok.butterflies.world.ButterflyData;
 import com.bokmcdok.butterflies.world.block.ButterflyLeavesBlock;
 import net.minecraft.core.BlockPos;
@@ -66,6 +67,12 @@ public class Butterfly extends Animal {
     // anywhere the light level is above 8.
     @Nullable private BlockPos targetPosition;
 
+    // The size of the butterfly.
+    private final ButterflyData.Size size;
+
+    // The speed of the butterfly.
+    private final double speed;
+
     /**
      * Checks custom rules to determine if the entity can spawn.
      * @param entityType (Unused) The type of the entity to spawn.
@@ -104,7 +111,7 @@ public static Butterfly createAdmiralButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_admiral.png",
+                "admiral",
                 entityType, level);
     }
 
@@ -119,7 +126,7 @@ public static Butterfly createBuckeyeButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_buckeye.png",
+                "buckeye",
                 entityType, level);
     }
 
@@ -134,7 +141,7 @@ public static Butterfly createCabbageButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_cabbage.png",
+                "cabbage",
                 entityType, level);
     }
 
@@ -149,7 +156,7 @@ public static Butterfly createChalkhillButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_chalkhill.png",
+                "chalkhill",
                 entityType, level);
     }
 
@@ -164,7 +171,7 @@ public static Butterfly createClipperButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_clipper.png",
+                "clipper",
                 entityType, level);
     }
 
@@ -179,7 +186,7 @@ public static Butterfly createCommonButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_common.png",
+                "common",
                 entityType, level);
     }
 
@@ -194,7 +201,7 @@ public static Butterfly createEmperorButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_emperor.png",
+                "emperor",
                 entityType, level);
     }
 
@@ -209,7 +216,7 @@ public static Butterfly createForesterButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_forester.png",
+                "forester",
                 entityType, level);
     }
 
@@ -224,7 +231,7 @@ public static Butterfly createGlasswingButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_glasswing.png",
+                "glasswing",
                 entityType, level);
     }
 
@@ -239,7 +246,7 @@ public static Butterfly createHairstreakButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_hairstreak.png",
+                "hairstreak",
                 entityType, level);
     }
 
@@ -254,7 +261,7 @@ public static Butterfly createHeathButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_heath.png",
+                "heath",
                 entityType, level);
     }
 
@@ -269,7 +276,7 @@ public static Butterfly createLongwingButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_longwing.png",
+                "longwing",
                 entityType, level);
     }
 
@@ -284,7 +291,7 @@ public static Butterfly createMonarchButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_monarch.png",
+                "monarch",
                 entityType, level);
     }
 
@@ -299,7 +306,7 @@ public static Butterfly createMorphoButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_morpho.png", entityType, level);
+                "morpho", entityType, level);
     }
 
     /**
@@ -313,7 +320,7 @@ public static Butterfly createRainbowButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_rainbow.png",
+                "rainbow",
                 entityType, level);
     }
 
@@ -328,7 +335,7 @@ public static Butterfly createSwallowtailButterfly(
             EntityType<? extends Butterfly> entityType,
             Level level) {
         return new Butterfly(
-                "butterfly_swallowtail.png",
+                "swallowtail",
                 entityType, level);
     }
 
@@ -377,17 +384,28 @@ public static void spawn(Level level,
 
     /**
      * The default constructor.
-     * @param texture The texture the butterfly should use.
+     * @param species The species of the butterfly.
      * @param entityType The type of the entity.
      * @param level The level where the entity exists.
      */
-    public Butterfly(String texture,
+    public Butterfly(String species,
                      EntityType<? extends Butterfly> entityType,
                      Level level) {
         super(entityType, level);
 
-        this.texture = new ResourceLocation(
-                "butterflies:textures/entity/butterfly/" + texture);
+        this.texture = new ResourceLocation("butterflies:textures/entity/butterfly/butterfly_" + species + ".png");
+
+        ResourceLocation location = new ResourceLocation(ButterfliesMod.MODID, species);
+        ButterflyData.Entry data = ButterflyData.getEntry(location);
+        this.size = data.size;
+
+        if (data.speed == ButterflyData.Speed.FAST) {
+            this.speed = BUTTERFLY_SPEED * 1.2d;
+        } else {
+            this.speed = BUTTERFLY_SPEED;
+        }
+
+        setAge(-data.butterflyLifespan);
     }
 
     /**
@@ -447,6 +465,15 @@ public boolean isPushable() {
         return false;
     }
 
+    /**
+     * Override so that the bounding box isn't recalculated for "babies".
+     * @param age The age of the entity.
+     */
+    @Override
+    public void setAge(int age) {
+        this.age = age;
+    }
+
     /**
      * The main update loop for the entity.
      */
@@ -519,9 +546,9 @@ protected void customServerAiStep() {
 
         Vec3 deltaMovement = this.getDeltaMovement();
         Vec3 updatedDeltaMovement = deltaMovement.add(
-                (Math.signum(dx) * 0.5d - deltaMovement.x) * BUTTERFLY_SPEED,
+                (Math.signum(dx) * 0.5d - deltaMovement.x) * this.speed,
                 (Math.signum(dy) * 0.7d - deltaMovement.y) * 0.1d,
-                (Math.signum(dz) * 0.5d - deltaMovement.z) * BUTTERFLY_SPEED);
+                (Math.signum(dz) * 0.5d - deltaMovement.z) * this.speed);
         this.setDeltaMovement(updatedDeltaMovement);
 
         this.zza = 0.5f;
@@ -549,6 +576,14 @@ protected void customServerAiStep() {
                     position,
                     EntityType.getKey(this.getType()));
         }
+
+        // If the caterpillar gets too old it will die. This won't happen if it
+        // has been set to persistent (e.g. by using a nametag).
+        if (!this.isPersistenceRequired() &&
+                this.getAge() >= 0 &&
+                this.random.nextInt(0, 15) == 0) {
+            this.kill();
+        }
     }
 
     /**
@@ -577,9 +612,7 @@ protected MovementEmission getMovementEmission() {
      * @return A scale value based on the butterfly's size.
      */
     public float getScale() {
-        ResourceLocation location = EntityType.getKey(this.getType());
-        ButterflyData.Size size = ButterflyData.getSize(location);
-        switch (size) {
+        switch (this.size) {
             case SMALL -> { return 0.25f; }
             case LARGE ->{ return 0.45f; }
             default -> { return 0.35f; }
diff --git a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Caterpillar.java b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Caterpillar.java
index 600a2d3..3bd9772 100644
--- a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Caterpillar.java
+++ b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Caterpillar.java
@@ -1,5 +1,6 @@
 package com.bokmcdok.butterflies.world.entity.animal;
 
+import com.bokmcdok.butterflies.ButterfliesMod;
 import com.bokmcdok.butterflies.world.ButterflyData;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -48,6 +49,9 @@ public class Caterpillar extends DirectionalCreature {
     @Nullable
     private Vec3 targetPosition;
 
+    // The size of the caterpillar.
+    private final ButterflyData.Size size;
+
     /**
      * Create a Morpho butterfly
      * @param entityType The type of the entity.
@@ -58,7 +62,7 @@ public class Caterpillar extends DirectionalCreature {
     public static Caterpillar createMorphoCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_morpho.png", entityType, level);
+        return new Caterpillar("morpho", entityType, level);
     }
 
     /**
@@ -71,7 +75,7 @@ public static Caterpillar createMorphoCaterpillar(
     public static Caterpillar createForesterCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_forester.png", entityType, level);
+        return new Caterpillar("forester", entityType, level);
     }
 
     /**
@@ -84,7 +88,7 @@ public static Caterpillar createForesterCaterpillar(
     public static Caterpillar createCommonCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_common.png", entityType, level);
+        return new Caterpillar("common", entityType, level);
     }
 
     /**
@@ -97,7 +101,7 @@ public static Caterpillar createCommonCaterpillar(
     public static Caterpillar createEmperorCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_emperor.png", entityType, level);
+        return new Caterpillar("emperor", entityType, level);
     }
 
     /**
@@ -110,7 +114,7 @@ public static Caterpillar createEmperorCaterpillar(
     public static Caterpillar createHairstreakCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_hairstreak.png", entityType, level);
+        return new Caterpillar("hairstreak", entityType, level);
     }
 
     /**
@@ -123,7 +127,7 @@ public static Caterpillar createHairstreakCaterpillar(
     public static Caterpillar createRainbowCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_rainbow.png", entityType, level);
+        return new Caterpillar("rainbow", entityType, level);
     }
 
     /**
@@ -136,7 +140,7 @@ public static Caterpillar createRainbowCaterpillar(
     public static Caterpillar createHeathCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_heath.png", entityType, level);
+        return new Caterpillar("heath", entityType, level);
     }
 
     /**
@@ -149,7 +153,7 @@ public static Caterpillar createHeathCaterpillar(
     public static Caterpillar createGlasswingCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_glasswing.png", entityType, level);
+        return new Caterpillar("glasswing", entityType, level);
     }
 
     /**
@@ -162,7 +166,7 @@ public static Caterpillar createGlasswingCaterpillar(
     public static Caterpillar createChalkhillCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_chalkhill.png", entityType, level);
+        return new Caterpillar("chalkhill", entityType, level);
     }
 
     /**
@@ -176,7 +180,7 @@ public static Caterpillar createSwallowtailCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
         return new Caterpillar(
-                "caterpillar_swallowtail.png",
+                "swallowtail",
                 entityType,
                 level);
     }
@@ -191,7 +195,7 @@ public static Caterpillar createSwallowtailCaterpillar(
     public static Caterpillar createMonarchCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_monarch.png", entityType, level);
+        return new Caterpillar("monarch", entityType, level);
     }
 
     /**
@@ -204,7 +208,7 @@ public static Caterpillar createMonarchCaterpillar(
     public static Caterpillar createCabbageCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_cabbage.png", entityType, level);
+        return new Caterpillar("cabbage", entityType, level);
     }
 
     /**
@@ -217,7 +221,7 @@ public static Caterpillar createCabbageCaterpillar(
     public static Caterpillar createAdmiralCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_admiral.png", entityType, level);
+        return new Caterpillar("admiral", entityType, level);
     }
 
     /**
@@ -230,7 +234,7 @@ public static Caterpillar createAdmiralCaterpillar(
     public static Caterpillar createLongwingCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_longwing.png", entityType, level);
+        return new Caterpillar("longwing", entityType, level);
     }
 
     /**
@@ -243,7 +247,7 @@ public static Caterpillar createLongwingCaterpillar(
     public static Caterpillar createClipperCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_clipper.png", entityType, level);
+        return new Caterpillar("clipper", entityType, level);
     }
 
     /**
@@ -256,7 +260,7 @@ public static Caterpillar createClipperCaterpillar(
     public static Caterpillar createBuckeyeCaterpillar(
             EntityType<? extends Caterpillar> entityType,
             Level level) {
-        return new Caterpillar("caterpillar_buckeye.png", entityType, level);
+        return new Caterpillar("buckeye", entityType, level);
     }
 
     /**
@@ -302,7 +306,7 @@ public static void spawn(ServerLevel level,
                 caterpillar.moveTo(x, y, z, 0.0F, 0.0F);
                 caterpillar.setSurfaceDirection(direction);
                 caterpillar.setSurfaceBlock(spawnPosition);
-                caterpillar.setAge(-24000);
+                //caterpillar.setAge(-24000);
 
                 caterpillar.finalizeSpawn(level,
                         level.getCurrentDifficultyAt(position),
@@ -324,9 +328,8 @@ public float getScale() {
         float scale = (float)getAge() / -24000.0f;
         scale *= 0.04;
         scale += 0.08;
-        ResourceLocation location = EntityType.getKey(this.getType());
-        ButterflyData.Size size = ButterflyData.getSize(location);
-        switch (size) {
+
+        switch (this.size) {
             case SMALL -> { return 0.7f * scale; }
             case LARGE ->{ return 1.28f * scale; }
             default -> { return scale; }
@@ -381,13 +384,19 @@ public void setAge(int age) {
 
     /**
      * Create a caterpillar entity.
+     * @param species The species of the butterfly
      * @param entityType The entity type.
      * @param level The level we are creating the entity in.
      */
-    protected Caterpillar(String texture,
+    protected Caterpillar(String species,
                           EntityType<? extends Caterpillar> entityType,
                           Level level) {
-        super("textures/entity/caterpillar/" + texture, entityType, level);
+        super("textures/entity/caterpillar/caterpillar_" + species + ".png", entityType, level);
+
+        ResourceLocation location = new ResourceLocation(ButterfliesMod.MODID, species);
+        ButterflyData.Entry data = ButterflyData.getEntry(location);
+        this.size = data.size;
+        setAge(-data.caterpillarLifespan);
     }
 
     /**
diff --git a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Chrysalis.java b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Chrysalis.java
index 650a437..32399d9 100644
--- a/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Chrysalis.java
+++ b/src/main/java/com/bokmcdok/butterflies/world/entity/animal/Chrysalis.java
@@ -1,5 +1,6 @@
 package com.bokmcdok.butterflies.world.entity.animal;
 
+import com.bokmcdok.butterflies.ButterfliesMod;
 import com.bokmcdok.butterflies.world.ButterflyData;
 import net.minecraft.core.BlockPos;
 import net.minecraft.core.Direction;
@@ -35,6 +36,9 @@ public class Chrysalis extends DirectionalCreature {
     public static final String BUCKEYE_NAME = "buckeye_chrysalis";
     public static final String CLIPPER_NAME = "clipper_chrysalis";
 
+    // The size of the caterpillar.
+    private final ButterflyData.Size size;
+
     /**
      * Create a Admiral chrysalis.
      *
@@ -45,7 +49,7 @@ public class Chrysalis extends DirectionalCreature {
     @NotNull
     public static Chrysalis createAdmiral(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_admiral.png", entityType, level);
+        return new Chrysalis("admiral", entityType, level);
     }
 
     /**
@@ -58,7 +62,7 @@ public static Chrysalis createAdmiral(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createBuckeye(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_buckeye.png", entityType, level);
+        return new Chrysalis("buckeye", entityType, level);
     }
 
     /**
@@ -71,7 +75,7 @@ public static Chrysalis createBuckeye(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createCabbage(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_cabbage.png", entityType, level);
+        return new Chrysalis("cabbage", entityType, level);
     }
 
     /**
@@ -84,7 +88,7 @@ public static Chrysalis createCabbage(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createChalkhill(EntityType<? extends Chrysalis> entityType,
                                             Level level) {
-        return new Chrysalis("chrysalis_chalkhill.png", entityType, level);
+        return new Chrysalis("chalkhill", entityType, level);
     }
 
     /**
@@ -97,7 +101,7 @@ public static Chrysalis createChalkhill(EntityType<? extends Chrysalis> entityTy
     @NotNull
     public static Chrysalis createClipper(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_clipper.png", entityType, level);
+        return new Chrysalis("clipper", entityType, level);
     }
 
     /**
@@ -110,7 +114,7 @@ public static Chrysalis createClipper(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createCommon(EntityType<? extends Chrysalis> entityType,
                                          Level level) {
-        return new Chrysalis("chrysalis_common.png", entityType, level);
+        return new Chrysalis("common", entityType, level);
     }
 
     /**
@@ -123,7 +127,7 @@ public static Chrysalis createCommon(EntityType<? extends Chrysalis> entityType,
     @NotNull
     public static Chrysalis createEmperor(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_emperor.png", entityType, level);
+        return new Chrysalis("emperor", entityType, level);
     }
 
     /**
@@ -136,7 +140,7 @@ public static Chrysalis createEmperor(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createForester(EntityType<? extends Chrysalis> entityType,
                                            Level level) {
-        return new Chrysalis("chrysalis_forester.png", entityType, level);
+        return new Chrysalis("forester", entityType, level);
     }
 
     /**
@@ -149,7 +153,7 @@ public static Chrysalis createForester(EntityType<? extends Chrysalis> entityTyp
     @NotNull
     public static Chrysalis createGlasswing(EntityType<? extends Chrysalis> entityType,
                                             Level level) {
-        return new Chrysalis("chrysalis_glasswing.png", entityType, level);
+        return new Chrysalis("glasswing", entityType, level);
     }
 
     /**
@@ -162,7 +166,7 @@ public static Chrysalis createGlasswing(EntityType<? extends Chrysalis> entityTy
     @NotNull
     public static Chrysalis createHairstreak(EntityType<? extends Chrysalis> entityType,
                                              Level level) {
-        return new Chrysalis("chrysalis_hairstreak.png", entityType, level);
+        return new Chrysalis("hairstreak", entityType, level);
     }
 
     /**
@@ -175,7 +179,7 @@ public static Chrysalis createHairstreak(EntityType<? extends Chrysalis> entityT
     @NotNull
     public static Chrysalis createHeath(EntityType<? extends Chrysalis> entityType,
                                         Level level) {
-        return new Chrysalis("chrysalis_heath.png", entityType, level);
+        return new Chrysalis("heath", entityType, level);
     }
 
     /**
@@ -188,7 +192,7 @@ public static Chrysalis createHeath(EntityType<? extends Chrysalis> entityType,
     @NotNull
     public static Chrysalis createLongwing(EntityType<? extends Chrysalis> entityType,
                                            Level level) {
-        return new Chrysalis("chrysalis_longwing.png", entityType, level);
+        return new Chrysalis("longwing", entityType, level);
     }
 
     /**
@@ -201,7 +205,7 @@ public static Chrysalis createLongwing(EntityType<? extends Chrysalis> entityTyp
     @NotNull
     public static Chrysalis createMonarch(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_monarch.png", entityType, level);
+        return new Chrysalis("monarch", entityType, level);
     }
 
     /**
@@ -214,7 +218,7 @@ public static Chrysalis createMonarch(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createMorpho(EntityType<? extends Chrysalis> entityType,
                                          Level level) {
-        return new Chrysalis("chrysalis_morpho.png", entityType, level);
+        return new Chrysalis("morpho", entityType, level);
     }
 
     /**
@@ -227,7 +231,7 @@ public static Chrysalis createMorpho(EntityType<? extends Chrysalis> entityType,
     @NotNull
     public static Chrysalis createRainbow(EntityType<? extends Chrysalis> entityType,
                                           Level level) {
-        return new Chrysalis("chrysalis_rainbow.png", entityType, level);
+        return new Chrysalis("rainbow", entityType, level);
     }
 
     /**
@@ -240,7 +244,7 @@ public static Chrysalis createRainbow(EntityType<? extends Chrysalis> entityType
     @NotNull
     public static Chrysalis createSwallowtail(EntityType<? extends Chrysalis> entityType,
                                               Level level) {
-        return new Chrysalis("chrysalis_swallowtail.png", entityType, level);
+        return new Chrysalis("swallowtail", entityType, level);
     }
 
     /**
@@ -267,7 +271,6 @@ public static void spawn(ServerLevel level,
                 chrysalis.setYRot(yRotation);
                 chrysalis.setSurfaceDirection(surfaceDirection);
                 chrysalis.setSurfaceBlock(spawnBlock);
-                chrysalis.setAge(-24000);
 
                 chrysalis.finalizeSpawn(level,
                         level.getCurrentDifficultyAt(spawnBlock),
@@ -289,9 +292,8 @@ public float getScale() {
         float scale = (float)getAge() / -24000.0f;
         scale *= 0.06;
         scale += 0.1;
-        ResourceLocation location = EntityType.getKey(this.getType());
-        ButterflyData.Size size = ButterflyData.getSize(location);
-        switch (size) {
+
+        switch (this.size) {
             case SMALL -> { return 0.7f * scale; }
             case LARGE ->{ return 1.28f * scale; }
             default -> { return scale; }
@@ -339,15 +341,19 @@ public void setAge(int age) {
 
     /**
      * Construction
-     *
-     * @param texture    The texture used to render the entity.
+     * @param species The species of the butterfly
      * @param entityType The type of the entity.
      * @param level      The current level.
      */
-    protected Chrysalis(String texture,
+    protected Chrysalis(String species,
                         EntityType<? extends Chrysalis> entityType,
                         Level level) {
-        super("textures/entity/chrysalis/" + texture, entityType, level);
+        super("textures/entity/chrysalis/chrysalis_" + species + ".png", entityType, level);
+
+        ResourceLocation location = new ResourceLocation(ButterfliesMod.MODID, species);
+        ButterflyData.Entry data = ButterflyData.getEntry(location);
+        this.size = data.size;
+        setAge(-data.chrysalisLifespan);
     }
 
     /**
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/clipper.json b/src/main/resources/data/butterflies/forge/biome_modifier/clipper.json
index ccafb9d..b0d82c8 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/clipper.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/clipper.json
@@ -14,8 +14,8 @@
   "spawners":
   {
     "type": "butterflies:clipper",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 2,
+    "minCount": 1,
+    "maxCount": 3
   }
 }
\ No newline at end of file
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/forester.json b/src/main/resources/data/butterflies/forge/biome_modifier/forester.json
index 25ca93a..6d29db7 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/forester.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/forester.json
@@ -13,8 +13,8 @@
   "spawners":
   {
     "type": "butterflies:forester",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 2,
+    "minCount": 1,
+    "maxCount": 3
   }
 }
\ No newline at end of file
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/glasswing.json b/src/main/resources/data/butterflies/forge/biome_modifier/glasswing.json
index dd3ba1b..43ba4f7 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/glasswing.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/glasswing.json
@@ -12,8 +12,8 @@
   "spawners":
   {
     "type": "butterflies:glasswing",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 5,
+    "minCount": 2,
+    "maxCount": 4
   }
 }
\ No newline at end of file
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/heath.json b/src/main/resources/data/butterflies/forge/biome_modifier/heath.json
index 5e3525a..7c5273a 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/heath.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/heath.json
@@ -12,8 +12,8 @@
   "spawners":
   {
     "type": "butterflies:heath",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 2,
+    "minCount": 1,
+    "maxCount": 3
   }
 }
\ No newline at end of file
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/morpho.json b/src/main/resources/data/butterflies/forge/biome_modifier/morpho.json
index 68ada94..0e16882 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/morpho.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/morpho.json
@@ -8,8 +8,8 @@
   "spawners":
   {
     "type": "butterflies:morpho",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 2,
+    "minCount": 1,
+    "maxCount": 3
   }
 }
\ No newline at end of file
diff --git a/src/main/resources/data/butterflies/forge/biome_modifier/rainbow.json b/src/main/resources/data/butterflies/forge/biome_modifier/rainbow.json
index 41dd9ab..471b010 100644
--- a/src/main/resources/data/butterflies/forge/biome_modifier/rainbow.json
+++ b/src/main/resources/data/butterflies/forge/biome_modifier/rainbow.json
@@ -24,8 +24,8 @@
   "spawners":
   {
     "type": "butterflies:rainbow",
-    "weight": 10,
-    "minCount": 3,
-    "maxCount": 5
+    "weight": 5,
+    "minCount": 2,
+    "maxCount": 4
   }
 }
\ No newline at end of file