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An Overlooked Cost for the Velvety Plumage of Owls: Entanglement in Adhesive Vegetation

AuthorsRodríguez, Airam ; Siverio, Felipe; Barone, Rubén; Rodríguez, Beneharo; Negro, Juan J.
Issue Date2009
PublisherWilson Ornithological Society
CitationThe Wilson Journal of Ornithology, 121(2):439-441. 2009.
AbstractWe used data collected during 1995– 2007 at the only Wildlife Rehabilitation Center on Tenerife Island (Canary Islands) to quantify entangle- ment mortality of owls. At least 66 of 1,206 Long- eared (Asio otus) and 5 of 231 Barn (Tyto alba) owls admitted to the Wildlife Rehabilitation Center were en- tangled in burr bristlegrass (Setaria adhaerens). Twelve (18.2%) of the 66 Long-eared Owls died as a result of entanglement while one of five Barn Owls died. A higher incidence of entanglement occurred during summer, coinciding with seed-head ripening and dispersing recently-fledged owls. Velvety plumage may be an important cost for owls, and responsible for owls acting as seed dispersers
Publisher version (URL)http://www.bioone.org/doi/full/10.1676/08-086.1
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