AGEING NORTH AMERICAN LANDBIRDS
BY MOLT LIMITS AND PLUMAGE CRITERIA

A Photographic Companion to the Identification Guide
to North American Birds, Part 1

By Dan Froehlich

NOW AVAILABLE!
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(PDF 4.95MB)

A Product of: The Institute for Bird Populations
and The U.S.D.I. Bureau of Reclamation

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Includes:

49 pages including extensive photo-captions and
discussion of ageing by molt limits

32 color photographs and 2 line drawings
illustrating molt limits and ageing

Pointers on each photograph indicating juvenal, formative, basic and alternate feathers among wing coverts, primaries, and secondaries