Which half of the earth has more bird migration?
the northern hemisphere
How long have people been observing and recording migration?
3,000 years
Who was one early writer recording migration?
Aristotle
And another?
Homer
What is one species that was recorded in early records?
swallows.
And another?
storks
What scientist in the 1700’s studied migration?
Johannes Leche
In what country was he observing?
Finland
What is a modern day method used for observing migration?
satellite tracking
Do man made items disturb bird migration?
yes
What is one object that does?
power lines
Any others?
wind farms too
Other than breeding grounds and wintering grounds what are birds seeking when they migrate?
food availability
Is migration a low risk activity for birds?
no
What might cause their death then?
hunting
Has man changing the landscape helped birds?
no