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1 October 2013 The Effects of Temperature on Nest Predation by Mammals, Birds, and Snakes
W. Andrew Cox, F. R. Thompson, J. L. Reidy
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Understanding how weather influences survival and reproduction is an important component of forecasting how climate change will influence wildlife population viability. Nest predation is the primary source of reproductive failure for passerine birds and can change in response to temperature. However, it is unclear which predator species are responsible for such patterns because predation events are rarely observed. We investigated whether temperature influenced predator-specific rates of nest predation by analyzing data from six prior studies conducted between 1997 and 2010 in Texas, Illinois, and Missouri that used constant-surveillance video systems to identify predators at the nests of Golden-cheeked Warblers (Setophaga chrysoparia), Blackcapped Vireos (Vireo atricapilla), Indigo Buntings (Passerina cyanea), and Acadian Flycatchers (Empidonax virescens). Rates of nest predation by snakes and birds increased as daily maximum temperatures increased, whereas predation by mammals was essentially invariant in response to temperature. The relative roles of physiological versus community-level mechanisms (e.g., abundance or behavior of predators and/or alternative prey) in driving the patterns we observed remain unclear, but our data point to the need to consider important biological interactions when forecasting the effects of climate change on songbird populations.

© The American Ornithologists' Union, 2013.
W. Andrew Cox, F. R. Thompson, and J. L. Reidy "The Effects of Temperature on Nest Predation by Mammals, Birds, and Snakes," The Auk 130(4), 784-790, (1 October 2013).
Received: 21 February 2013; Accepted: 1 June 2013; Published: 1 October 2013
cause-specific mortality
nest survival
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