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Endangered Species Research

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ESR 11:215-220 (2010)  -  DOI:

Characterization of golden-cheeked warbler Dendroica chrysoparia habitat at Fort Hood, Texas, USA

Verl R. Emrick1,*, Scott Tweddale2, Michael St. Germain1

1Conservation Management Institute, Virginia Polytechnic Institute and State University, 1900 Kraft Drive, Suite 250, Blacksburg, Virginia, 24061, USA
2USACERL Champaign, Illinois, PO Box 9005, Champaign, Illinois 61826-9005, USA

ABSTRACT: The golden-cheeked warbler Dendroica chrysoparia is a federally endangered, neotropical-nearctic migrant songbird that breeds in central Texas, USA, and prefers mature, closed canopy oak–Ashe juniper woodlands for nesting and foraging. Fort Hood is an 87890 ha military reservation located in central Texas in Bell and Coryell Counties on the eastern edge of the Edwards Plateau ecoregion. We surveyed for golden-cheeked warblers and measured habitat variables at 95 separate locations in a 56.6 km2 research area that supports a golden-cheeked warbler breeding population. We detected golden-cheeked warblers on 34 of 95 (36%) point count locations. Principal component analysis was used to reduce the 27 habitat variables to a set of uncorrelated variables. This analysis resulted in the identification of 4 principal components that accounted for 52% of the variance. Logistic regression identified one principal component (ratio of Ashe juniper to other woody species) that was strongly related to golden-cheeked warbler occurrence. Our data indicate that a 4:1 ratio of Ashe juniper to other woody species is an important feature of occupied golden cheeked-warbler habitat, particularly in the mid- to upper canopy at Fort Hood.

KEY WORDS: Golden-cheeked warbler · Ashe juniper · Habitat · Military training

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Cite this article as: Emrick VR, Tweddale S, St. Germain M (2010) Characterization of golden-cheeked warbler Dendroica chrysoparia habitat at Fort Hood, Texas, USA. Endang Species Res 11:215-220.

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