Female American goldfinches use carotenoid-based bill coloration to signal status
By T. G. Murphy, Malcolm F. Rosenthal, R. Montgomerie, K. A. Tarvin. 2009
111 citations recorded by the source corpus.
Subfields: Ecology, Ecology, Evolution, Behavior and Systematics
View Paper: https://www.semanticscholar.org/paper/9b4dd854374591724eb73a03dc75eb4395f2f165