diff --git a/.gitignore b/.gitignore
index 17ac87c..f09646d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -122,4 +122,7 @@ index_files/
 index.tex
 
 # Prevents committing locally rendered site
-docs
\ No newline at end of file
+docs
+*.Rproj
+*.Rhistory
+.Rproj.user
diff --git a/_quarto.yml b/_quarto.yml
index d3c327a..bdd5888 100644
--- a/_quarto.yml
+++ b/_quarto.yml
@@ -46,3 +46,4 @@ format:
     theme: [pandoc, theme.scss]
     toc: true
     toc-title: Table of Contents
+    link-external-newwindow: true
diff --git a/content/tutorials/external/ecodiv.yml b/content/tutorials/external/ecodiv.yml
new file mode 100644
index 0000000..f4cf02d
--- /dev/null
+++ b/content/tutorials/external/ecodiv.yml
@@ -0,0 +1,28 @@
+- title: Species distribution modeling using Maxent in GRASS GIS
+  path: https://ecodiv.earth/TutorialsNotes/sdmingrassgis/
+  author: Paulo van Breugel
+  image: content/tutorials/external/images/sdm_in_grass_tutorialbanner.png
+  date: "2025-02-12"
+  description: Creating species distribution models to predicting the current and future distribution of the Almond-eyed Ringlet.
+  categories: ['biogeography', 'ecology', 'intermediate', 'advanced']
+- title: Density distribution map of white-tailed deer
+  path: https://ecodiv.earth/TutorialsNotes/deerdensities/index.html
+  author: Paulo van Breugel
+  image: content/tutorials/external/images/deer-density-tile.png
+  date: "2025-01-10"
+  description: Creating a habitat suitability map for the white-tailed deer using spatial multicriteria analysis and spatial disaggregation in GRASS GIS.
+  categories: ['biogeography', 'MCDA', 'ecology', 'intermediate']
+- title: From suitability to suitable regions
+  path: https://ecodiv.earth/TutorialsNotes/SuitabilityRegions/index.html
+  author: Paulo van Breugel
+  image: content/tutorials/external/images/suitability-regions-tile.png
+  date: "2024-05-25"
+  description: In this tutorial you learn how you can identify and map regions with user defined minimum suitability scores and area size, using as input a suitability map.
+  categories: ['biogeography', 'MCDA', 'ecology', 'beginner']
+- title: Tree species diversity distribution
+  path: https://ecodiv.earth/post/tree-species-diversity-distribution/
+  author: Paulo van Breugel
+  image: content/tutorials/external/images/tree-diversity-tile.png
+  date: "2020-07-29"
+  description: This tutorial shows you how to create maps of the tree species diversity across the contiguous USA, using various diversity indices, such as the species richness, Shannon index, Simpson index and the Shannon based effective number of species (ENS).
+  categories: ['biodiversity', 'geobiogeography', 'ecology', 'beginner']
diff --git a/content/tutorials/external/images/deer-density-tile.png b/content/tutorials/external/images/deer-density-tile.png
new file mode 100644
index 0000000..3c89156
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diff --git a/content/tutorials/external/images/ecodiv.png b/content/tutorials/external/images/ecodiv.png
index d5e9834..797e7e9 100644
Binary files a/content/tutorials/external/images/ecodiv.png and b/content/tutorials/external/images/ecodiv.png differ
diff --git a/content/tutorials/external/images/sdm_in_grass_tutorialbanner.png b/content/tutorials/external/images/sdm_in_grass_tutorialbanner.png
new file mode 100644
index 0000000..3176322
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diff --git a/content/tutorials/external/images/suitability-regions-tile.png b/content/tutorials/external/images/suitability-regions-tile.png
new file mode 100644
index 0000000..b5a230f
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diff --git a/content/tutorials/external/images/tree-diversity-tile.png b/content/tutorials/external/images/tree-diversity-tile.png
new file mode 100644
index 0000000..9b46f82
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diff --git a/index.qmd b/index.qmd
index 21fffbd..7d692df 100644
--- a/index.qmd
+++ b/index.qmd
@@ -2,7 +2,8 @@
 title: "Learn GRASS GIS"
 listing:
     contents: 
-        - content/tutorials
+        - content/tutorials    
+        - content/tutorials/external/ecodiv.yml
     sort: "date desc"
     type: grid
     categories: true
@@ -11,4 +12,4 @@ page-layout: full
 description: |
   Hands-on tutorials for learning [GRASS GIS](https://grass.osgeo.org), an open source computational engine for geospatial processing and analysis.
 title-block-banner: false
----
\ No newline at end of file
+---