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Peregrine Falcon predation of endangered Laysan Teal and Laysan Finches on remote Hawaiian atolls.
|Title:||Peregrine Falcon predation of endangered Laysan Teal and Laysan Finches on remote Hawaiian atolls.|
|Keywords:||novel predators, endemic bird, Peregrine falcons|
|Series:||Technical Report HCSU - 065|
|Abstract:||We report the first records of Peregrine falcon (Falco peregrinus) predation on endangered Laysan teal (or duck; Anas laysanensis) and predation on endangered Laysan finches (Telespiza cantans). At Midway Atoll, vagrant Peregrine falcons killed ≥4% of a newly translocated Laysan teal population in 2006 and ≥2% in 2008. On Laysan Island during 2008–2009, remains of >76 Laysan finches (<1% of the population) were found at peregrine perches. On Midway Atoll, all depredated Laysan teal and other seabirds were recovered at kill sites on tarmac (runways). If
the frequency or duration of vagrant raptors visitation increases at small atolls, this could pose
a mortality risk to consider, especially during proposed translocations of endangered species.Vegetation restoration of abandoned runways near wetlands at Midway Atoll would provide cover and may help reduce mortality of endangered species due to vagrant raptors.
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Hawaii Cooperative Studies Unit (HCSU)|
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