IDENTIFICATION NOTES: PLUMAGE WEAR IN VIREO BELLII

Abstract

In this note I respond to and expand on some of the ideas presented by Stallcup (1984) in his “identification quiz” on Bell’s Vireo. The bird depicted in the quiz was photographed at San Blas, Nayarit, in December 1975. The published black-and-white print is a reproduction of an original color slide, which Bruce Webb and Tim Manolis kindly loaned me.