Age and Sex Differences in Winter Distribution of American Goldfinches in Eastern North America

Abstract

David R. C. Prescott, Alex L. A. Middleton, Age and Sex Differences in Winter Distribution of American Goldfinches in Eastern North America, Ornis Scandinavica (Scandinavian Journal of Ornithology), Vol. 21, No. 2 (Jun., 1990), pp. 99-104