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Title: Nocturnal predation of females on nests: an important source of mortality for golden-cheeked warblers?

Author: Reidy, Jennifer L.; Stake, Mike M.; Thompson, Frank R. III.;

Date: 2009

Source: The Wilson Journal of Ornithology. 121(2): 416-421.

Publication Series: Scientific Journal (JRNL)

Description:

We monitored 124 female Goldencheeked Warblers (Dendroica chrysoparia) at 133 nests with video cameras from 1997-2002 and 2005-2006 at two study areas in central Texas, USA. Six adult females were depredated by snakes in 781 camera- monitored intervals when females were on the nest at night and exposed to possible nocturnal predation. Daily nest survival was 0.971 (95% CI: 0.959-0.980) and daily adult female predation while nesting was 0.008 (95% CI: 0.003-0.017). We estimated that 14.6% of breeding females were depredated on the nest during the breeding season based on the observed survival rates and assuming females whose first nest was unsuccessful and which survived attempted a second nesting attempt. Females were captured 75% of the times they were on the nest at the time of a nocturnal nest predation by a snake. Predation of nesting females is potentially an important source of mortality for Golden-cheeked Warblers, and warrants further investigation.

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Citation:


Reidy, Jennifer L.; Stake, Mike M.; Thompson, Frank R. III. 2009. Nocturnal predation of females on nests: an important source of mortality for golden-cheeked warblers?

 


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