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Are nest boxes ecological traps for red-footed falcons Falco vespertinius at Naurzum

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Abstract

Nest box programs are frequently implemented for conservation of cavity-nesting birds, but their effectiveness is rarely evaluated in comparison to birds not using nest boxes. In the European Palearctic, Red-Footed Falcon (Falco vespertinus) populations are both of high conservation concern and are strongly associated with nest box programs in heavily managed landscapes. We used a 21-year monitoring dataset developed from monitoring 753 nesting attempts by Red-footed Falcons at the Naurzum Zapovednick to evaluate response of demographic parameters of Redfooted Falcons to environmental factors including use of nest boxes. Variations in lay date and in numbers of eggs were not well explained by any one model, but instead by combinations of models with terms for nest type, land cover type and degree of coloniality. In contrast, variation in both offspring loss and numbers of fledglings produced were fairly well explained by a single model including terms for nest type, land cover type, and an interaction between the two parameters (65% and 81% model weights respectively). Because, for other species, early lay dates are associated with individual fitness, this interaction highlighted a potential ecological trap where falcons using nest boxes on forest edges at Naurzum lay eggs earlier but suffer greater offspring loss and produce lower numbers of fledglings than do those in other nesting settings.

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Additional publication details

Publication type Conference Paper
Publication Subtype Conference Paper
Title Are nest boxes ecological traps for red-footed falcons Falco vespertinius at Naurzum
Year Published 2017
Language English
Publisher Kostanay State Pedagogical Institute
Contributing office(s) Forest and Rangeland Ecosystem Science Center
Description 5 p.
Larger Work Type Book
Larger Work Subtype Conference publication
Larger Work Title Biological diversity of Asian Steppe: Proceedings of the III international scientific conference
First page 240
Last page 244
Conference Title III International Scientific Conference: Biological Diversity of Asian Steppe
Conference Location Kostanay, Kazakhstan
Conference Date Apr 24-27, 2017
Country Kazahkstan
State Kostanay Oblast
Other Geospatial Naurzum State Nature Reserve
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