Winter ecology of the endangered golden-cheeked warbler
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Abstract
We studied the ecology of the Golden-cheeked Warbler (Dendroica chrysoparia) during three winter seasons, 1995-1998, in Honduras, Guatemala, and Mexico. Individuals of this species occurred almost exclusively as members of mixed-species flocks, occupying sites with greater densities of encino oak and ground cover and fewer pines than random sites. Most foraging observations were recorded in mid-story, encino oak. Commonly-observed foraging maneuvers were gleaning and sally-hovering. Eighty-three percent of foraging maneuvers were directed at the outermost portions of the oak foliage. Flocks in which Golden-cheeked Warblers occurred contained an average of 20.5 individuals and 12.9 species other than Golden-cheeked Warblers. The most frequently co-occurring species were Wilson's Warbler (Wilsonia pusilla), Black-throated Green Warbler (Dendroica virens), Hermit Warbler (D. occidentalis), Townsend's Warbler (D. townsendi), and Blue-headed Vireo (Vireo solitarius). The ratio of males to females observed was not substantially different from 1:1, and there was little evidence of sexual differences in habitat use. Golden-cheeked Warblers appeared to be tolerant of moderate levels of logging and grazing, but understory clearing to promote grazing for cattle may pose a significant threat to winter habitat availability.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Winter ecology of the endangered golden-cheeked warbler |
| Series title | The Condor |
| DOI | 10.2307/1370063 |
| Volume | 101 |
| Issue | 4 |
| Year Published | 1999 |
| Language | English |
| Publisher | Oxford Academic |
| Contributing office(s) | Wetland and Aquatic Research Center |
| Description | 9 p. |
| First page | 762 |
| Last page | 770 |
| Google Analytic Metrics | Metrics page |