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Osprey on Catalina; Year Round?
Topic Started: May 8 2009, 05:19 PM (386 Views)
harpo516
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Question came up today and we discovered this:

Osprey Reintroduction Program:
The Institute for Wildlife Studies (IWS), in collaboration with the Santa Catalina Island Conservancy, has started an osprey reintroduction program on Santa Catalina Island, in order to return a key component of the ecosystem to the Channel Islands and southern California. The osprey is currently listed as a Species of Special Concern by the California Department of Fish and Game. Although ospreys once occurred as breeding residents on the southern Channel Islands (Kiff 1980), there are currently no known nesting pairs on the islands. San Clemente Island contained the largest number of nesting pairs, with at least 20 nests found in 1907 (Linton 1908, Kiff 1980). Ospreys also were common on Santa Catalina Island, although no estimates of their numbers can be found (Kiff 1980). However, Howell (1917, as cited in Kiff 1980) reported that on Santa Catalina Island "every detached rock of any height [had] its resident pair".

During July 2000, Institute for Wildlife Studies personnel removed 4 ospreys between the age of 5 and 6 weeks from wild nests at Eagle Lake, California. These birds were transported to Santa Catalina Island and placed in a release tower at Thompson Reservoir. The hacking technique has been used successfully to introduce ospreys in other areas (e.g., Hammer and Hatcher 1983, Schaadt and Rymon 1983, Martell et al. 1994), and IWS has been using the technique for over 20 years to reintroduce bald eagles (Haliaeetus leucocephalus) to Santa Catalina Island. http://www.iws.org/osprey2.htm

and there's a 2001 report

http://www.dfg.ca.gov/wildlife/nongame/pub...ocs/2000_03.pdf




Are the osprey re-establishing on Catalina and do they stay year round like the adult bald eagle pairs do?

thanks....
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