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Providing evidence to improve practice

Individual study: Provision of nest boxes for Eurasian kestrels Falco tinnunculus in Campo Azálvaro, Spain

Published source details

Fargallo J.A., Blanco G., Potti J. & Vinuela J. (2001) Nestbox provisioning in a rural population of Eurasian kestrels: breeding performance, nest predation and parasitism. Bird Study, 48, 236-244


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Provide artificial nesting sites for falcons Bird Conservation

A before-and-after study in mixed farmland and oak woodlands in Avila and Segovia, central Spain (Fargallo et al. 2001), found that the local population of Eurasian kestrels Falco tinnunculus more than doubled between 1993 (23 pairs) and 1998 (55 pairs) following the installation of 47 nest boxes over the same period. The number of kestrels in natural nests remained approximately constant (15-25 pairs), whilst the number in nest boxes increased from three (1993) to 35 (1998). Birds in nest boxes fledged more chicks and experienced less nest predation than those in natural sites (3.6-3.8 fledglings/clutch and 12% predation for 79 nest box clutches vs. 2.4-2.8 fledglings/clutch and 37% predation for 37 clutches in natural nests). Nest box chicks had more ectoparasites, but this difference was not significant. Nest boxes were installed in winter: 14 in 1993-4, 11 in 1994-5, 16 in 1996-7 and six in 1998.