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 following.

Action Category

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

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

    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.


Output references

What Works in Conservation

What Works in Conservation provides expert assessments of the effectiveness of actions, based on summarised evidence, in synopses. Subjects covered so far include amphibians, birds, terrestrial mammals, forests, peatland and control of freshwater invasive species. More are in progress.

More about What Works in Conservation

Download free PDF or purchase
The Conservation Evidence Journal

The Conservation Evidence Journal

An online, free to publish in, open-access journal publishing results from research and projects that test the effectiveness of conservation actions.

Read the latest volume: Volume 18

Go to the CE Journal

Discover more on our blog

Our blog contains the latest news and updates from the Conservation Evidence team, the Conservation Evidence Journal, and our global partners in evidence-based conservation.

Who uses Conservation Evidence?

Meet some of the evidence champions

Endangered Landscape Programme Red List Champion - Arc Kent Wildlife Trust The Rufford Foundation Save the Frogs - Ghana Bern wood Supporting Conservation Leaders National Biodiversity Network Sustainability Dashboard Frog Life The international journey of Conservation - Oryx British trust for ornithology Cool Farm Alliance UNEP AWFA Butterfly Conservation People trust for endangered species Vincet Wildlife Trust