Identification Guide to North American Birds, Part II
By T. Lloyd-Evans. 2009
169 citations recorded by the source corpus.
Subfields: Ecology
View Paper: https://www.semanticscholar.org/paper/423c60a3803d11cfa9ec38565f3f912bf1415469
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In Ecology
Citations in the corpus
- Female American goldfinches use carotenoid-based bill coloration to signal status (2009, methodology): “Sex and age-class were determined by plumage (Pyle 1997).”