Bald Eagle Nestling Age Classes

By: David Hancock:
Bald Eagle Biologist

Bald Eagle Nestling Age Classes:
(Waiting for DH photos)


Chicks- Colour/Size and Estimated Age

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Class 1.
White and Small. Never left alone
for more than 2-3 minutes 1 – 10 day days
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Class 2.
Starting Grey and Small. In warm
weather left alone 1-10 minutes 1 ½ – 3 weeks old
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Class 3
Grey sit up in nest. Can be left
alone in warm weather 10-+ min. 4-5 weeks old
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Class 4
Brown feather just starting to
show in a few rows 6-7 weeks old
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Class 5
Brown feathers showing as
dominant tracks 8-9 weeks old
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Class 6
Brown and full size body:
No grey down showing. 10-12 weeks old
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Class 7
Fledglings: Uniformly brown:
Chicks fledge at 80 to 90 days of age.
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