Bald Eagle Nestling Age Classes

By: David Hancock:
Bald Eagle Biologist

Chicks- Colour/Size and Estimated Age

Class 1.

White and Small.
Never left alone for more than 2-3 minutes 1 - 10 day days

Class 2.

Starting Grey and Small. In warm weather left alone 1-10 minutes 1 1/2 - 3 weeks old

Class 3

Grey sit up in nest.
Can be left alone in warm weather 10-+ min. 4-5 weeks old

Class 4

Brown feather just starting to show in a few rows 6-7 weeks old

Class 5

Brown feathers showing as dominant tracks 8-9 weeks old

Class 6

Brown and full size body: No grey down showing. 10-12 weeks old

Class 7

Fledglings: Uniformly brown: Chicks fledge at 80 to 90 days of age.

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biologyreference/nestlingageclasses.txt · Last modified: 2010/04/05 23:35 (external edit)
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