Nest box temperature and hatching success of American kestrels varies with nest box orientation

  • Published source details Butler M.W., Whitman B.A. & Dufty A.M. Jr. (2009) Nest box temperature and hatching success of American kestrels varies with nest box orientation. The Wilson Journal of Ornithology (formerly The Wilson Bulletin), 121, 778-782.


This study is summarised as evidence for the following.

Action Category

Provide artificial nesting sites for falcons

Action Link
Bird Conservation
  1. Provide artificial nesting sites for falcons

    A replicated study in 2005 in sagebrush steppe and agricultural fields in Idaho, USA (Butler et al. 2009 ), found that 71% of 59 nest boxes were occupied by American kestrels Falco sparverius. Box orientation did not significantly affect occupancy rates (although no east-facing boxes were occupied) but did affect hatching success (43% of 21 southwest-facing nest boxes unsuccessful vs. 25% of 12 southeast-facing boxes and 0% for nine facing north-west). West-facing boxes were approximately 0.6°C cooler on average than east- and south-facing boxes, and also less humid. Nest boxes were 21 x 21 x 46 cm and erected at 2.5-3.0 m off the ground on utility poles.


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