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Crested Auklet Aethia cristatella as a prey item in an inland Gyrfalcon Falco rusticolus nest
Citation
ROBINSON, B.W. & ANDERSON, D.L. 2016. Crested Auklet Aethia cristatella as a prey item in an inland Gyrfalcon Falco rusticolus nest.
Marine Ornithology 44: 229
- 231
http://doi.org/10.5038/2074-1235.44.2.1183
Received 26 April 2016, accepted 1 July 2016
Date Published: 2016/10/15
Date Online: 2017/02/28
Key words: Alaska, Aethia cristatella, Crested Auklet, Falco rusticolus, Gyrfalcon, inland movement, predation
Abstract
We report Crested Auklet Aethia cristatella as a prey item of a Gyrfalcon Falco rusticolus nesting in inland western Alaska. This represents the first documented case as a Gyrfalcon prey item during the breeding season in North America, and the fourth documented case of inland movements of Crested Auklet. The presence of the auklet in the Gyrfalcon nest is notable due to the distance (105 km) to the nearest coastline. Weather likely caused the inland movement of the auklet. Because of the connection between weather events and inland movements of alcids, and the predicted increase and severity of weather due to climate change, continued reporting of inland movements may serve as a measure of change and its impacts on seabirds. Continued use of nest cameras to monitor raptor diet during nesting may also serve as a sampling tool for capturing similar instances of inland movements, and complement the use of eBird for sightings of live birds in understudied areas to gain a better understanding of the frequency of inland movements in the family Alcidae.
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