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Apparent Survival of Woodpeckers and Nuthatches in Wisconsin

Authors: Jenna A. Cava; Jason D. Riddle; Richard P. Thiel;

Apparent Survival of Woodpeckers and Nuthatches in Wisconsin

Abstract

Few annual survival and capture-probability estimates exist for sittid and picid species common in North America. We used a mark—recapture study and robust design analysis in Program MARK to estimate annual survival rates based on a sample of 51 Sitta carolinensis (White-breasted Nuthatch), 12 Picoides pubescens (Downy Woodpecker), and 15 Picoides villosus (Hairy Woodpecker) wintering in central Wisconsin, 2006–2013. Apparent survival probability was similar between the two woodpecker species (Downy Woodpecker: p = 0.51, 95% CI = 0.34–0.68; Hairy Woodpecker: p = 0.52, 95% CI = 0.36– 0.68). Apparent annual survival modeled as constant across time was low for both sexes of White-breasted Nuthatch (0.25 [CI = 0.12–0.44] and 0.28 [CI = 0.14–0.49] for males and females, respectively), but there was some evidence for annual variation in survival. All three species showed evidence for a trap-happy response in which recapture probability was higher than original capture probability, but it was stronger in the White-breasted Nuthatches than the two woodpecker species. There is little evidence of temporary emigration for any of the woodpecker taxa we studied. Our results provide baseline demographic data for these species in Wisconsin and will be useful in planning future trapping studies.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
2
Average
Average
Average
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