Diet, prey delivery rates, and prey biomass of Northern Goshawks in East-Central Arizona
Studies in Avian Biology
By: A.S. Rogers, S. DeStefano, and M.F. Ingraldi
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Abstract
Recent concern over persistence of Northern Goshawk (Accipiter gentilis) populations in Arizona has stemmed from two long-term demography studies that report substantial yearly fluctuations in productivity and evidence of a declining population. Although many factors could be involved in changes in productivity and population declines, availability of food is one such factor. As part of a demography study on the Sitgreaves portion of the Apache-Sitgreaves National Forest in Arizona, we used remote cameras to assess diets of goshawks. Northern Goshawks preyed upon 22 species during two nesting seasons. Adult pairs tended to specialize on particular species of prey. Prey delivery rates decreased throughout the nesting season with a corresponding increase in biomass in the latter stages of the nestling and fledgling periods. Adults appeared to take larger prey as nestlings increased in age.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Diet, prey delivery rates, and prey biomass of Northern Goshawks in East-Central Arizona |
| Series title | Studies in Avian Biology |
| Issue | 31 |
| Year Published | 2006 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Studies in Avian Biology |
| First page | 219 |
| Last page | 227 |
| Google Analytic Metrics | Metrics page |