Geographic variation in the yellow-billed cuckoo

Publication Type:

Journal Article

Authors:

Banks, Richard C.

Source:

Condor, Cooper Ornithological Society, Volume 90, Issue 2, p.473-477 (1988)

Call Number:

A88BAN01IDUS

URL:

https://sora.unm.edu/node/103974

Keywords:

Coccyzus americanus, yellow-billed cuckoo

Abstract:

Populations of the Yellow-billed Cuckoo, Coccyzus americanus, west of the Rocky Mountains have average wing lengths slightly greater than those of eastern North America, but the difference is not sufficient for taxonomic recognition. There is no geographically oriented variation in bill size or color, and the species is best considered monotypic.