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Providing evidence to improve practice

Individual study: Wild-reared aplomado falcons Falco femoralis septentrionalis survive and recruit at higher rates than hacked falcons, Rio Grande Valley and Texas Coastal Bend, Texas, USA

Published source details

Brown J.L., Collopy M.W., Gott E.J., Juergens P.W., Montoya A.B. & Grainger Hunt W. (2006) Wild-reared aplomado falcons survive and recruit at higher rates than hacked falcons in a common environment. Biological Conservation, 131, 453-458

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

Release captive-bred individuals into the wild to restore or augment wild populations of raptors Bird Conservation

A review of a reintroduction programme for northern aplomado falcons Falco femoralis septentrionalis in coastal plains in Texas, USA (Brown et al. 2006), found that the release of captive-bred falcons since 1993 had led to the establishment, by 2002-4, of 38 breeding pairs in the two study areas. During 2001-3, 141 captive-bred falcons reached independence in the study area, and 75 chicks fledged. Of these, 43 (19 released and 24 wild-bred) were seen after fledging at least once. Of 18 birds recruited into the breeding population (i.e. forming breeding pairs), only three (17%) were captive-bred and released and 15 (83%) were wild-bred. Captive-bred birds were ‘hacked’ during release. This involved providing cohorts of 2-8 birds with food for 21 days after release. Those birds seen after 21 days were said to have reached independence.