Abstract
Criteria for separating young of the year from adult gallinaceous birds are comparatively well known and have been treated in an earlier paper (Petrides, 1942), but more exact methods of determining age have yet to be developed for most species. The present study is an attempt to provide age determination data for bob-whites (Colinus virginianus) one to five months old, similar to that determined by Louis Bureau for the Hungarian partridge (Perdix perdix) and red quail (Alectoris rufa) in France. His reports (1911, 1913) contain tables and diagrams of wing feather replacement and growth that purportedly permit the determination of age, within 1 to 3 days, of healthy birds collected during their post-juvenal molt.
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