PEREGRINATIONS OF FEMALE PRAIRIE FALCONS AFTER FLEDGING: GOODBYE CALIFORNIA? | |||
| Douglas A Bell; East Bay Regional Park District; dbell@ebparks.org; David Sexton; East Bay Regional Park District;, Dewey Savell; Delta Raptor Breeding Facility | |||
Little is known about the movements of juvenile prairie falcons (Falco mexicanus) in California. We provide preliminary results from a satellite-tracking study of female prairie falcons captured by hand in the nest and outfitted with transmitters at fledging in two areas of California: the San Francisco East Bay Area and the Mojave Desert. Our approach has been extremely conservative to minimize impacts to falcons, only the largest female nestling from each of six broods was transmittered between 2020 and 2024. Despite the low sample size, some qualitative patterns are evident. Namely, all falcons dispersed from their natal territories at 10-11 weeks of age, and all moved out of California rapidly in directions ranging from northerly to easterly. All but one falcon ceased transmitting before spring. We discuss these findings in relation to known migratory patterns, population genetics and conservation management of the prairie falcon. | |||
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