Publication Type: | Journal Article |
Year of Publication: | 1976 |
Authors: | Bock, CE, Lepthien, LW |
Journal: | American Midland Naturalist |
Volume: | 96 |
Issue: | 1 |
Date Published: | 1976 |
ISBN Number: | 00030031 |
Keywords: | Corvidae, Cyanocitta, Cyanocitta cristata, Garrulus, Garrulus glandarius |
Abstract: | Audubon Society Christmas count data indicate that between 1962 and 1971 the North American blue jay population (Cyanocitta cristata) increased about 30%, and that migration of this species declined. The most likely cause was the increase in winter feeding by man. Results of this study suggest that winter food supplies and overwinter survival are (or, at least, were) limiting to northern blue jay populations. |
URL: | http://www.jstor.org/stable/2424584 |
Short Title: | American Midland Naturalist |
Taxonomic name: