The feeding response of some forest birds to the black-headed budworm
- 1 March 1970
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Zoology
- Vol. 48 (2) , 359-366
- https://doi.org/10.1139/z70-057
Abstract
The predatory effect of nine species of forest birds on the large-larval and pupal stages of the black-headed budworm was investigated for 3 years. Successive bird collections and subsequent gizzard analyses within a season permitted the development of response curves that show changes in consumption in relation to changes in prey size, density, and other characteristics within the season. Percentage predation varied from 3 to 14% over the 3 years and strongly suggested that birds act in a density-dependent manner.Keywords
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