We monitored the breeding performance (territory occupancy, nest success, productivity) of a reintroduced hybrid population of Falco peregrinus anatum (Peregrine Falcon) in western North Carolina during the 13-y post-delisting period of 2003–2015. Peregrine Falcons nested at 18 sites (17 cliffs, 1 building), 6 of which were newly discovered sites. Eight to 13 territories were occupied annually. We documented 139 nesting attempts and production of 171 young. Mean nest success (55%) during the period 2003–2015 fell below the 1999–2002 national average, but was more than double earlier (1987–1992) efforts in western North Carolina. Likewise, mean productivity (1.23 young/year/pair) was more than double earlier efforts in North Carolina, but reflects the disproportionately high contribution of ~5 sites. Throughout the study, subadult birds were members of a pair (13.7% of nesting attempts) and had lower nest success than adult pairs. High variability in nest success and productivity underscore the need for continued monitoring and protection from disturbance and other threats, especially at the most vulnerable and least productive sites.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 17 • No. 1