File:Distribution and migration of North American gulls and their allies (1915) (14596293950).jpg

Identifier: distributionmigr292cook (find matches)
Title: Distribution and migration of North American gulls and their allies
Year: 1915 (1910s)
Authors: Cooke, Wells Woodbridge, 1858-1916
Subjects: Gulls
Publisher: Washington, D.C. : U.S. Dept. of Agriculture
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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istinction needs to be made in the case ofBonapartes gull between its summer home and its nesting range,since many of this species remain through the summer as nonbreedersfar south of the district in which they nest. Eggs or nests or un-fledged young have been found at only a few places. This gullbreeds abundantly in northern Mackenzie in the region around FortAnderson (MacFarlane), and thence west to Fort Yukon and thelower Yukon, at Nulato (Dall), the only places in Alaska whence the 58 BULLETIN U. S. DEPARTMENT OF AGRICULTURE. eggs have been reported. It breeds south to the lakes on the upperPelly River in Yukon (Pike) and to Atlin in northern British Colum-bia (Anderson); these five places seem to be the only sure records ofactual nesting. Although the species has been reported as nestingat various places south to southern British Columbia, Alberta, Mani-toba, southern Keewatin, and even to North Dakota, Minnesota,Wisconsin, and Michigan, it is very suggestive that it is not known
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Bonapartes gull (Larus Philadelphia). to nest on any of the large lakes in southern Mackenzie, where itwould certainly breed if it did at these much more southern locali-ties. The probabilities are that Bonapartes gull is an arctic- and sub-arctic-breeding bird which finds its most congenial home on the Arcticlakes and rivers at the farthest north it can find the evergreens onwhich it places its nest. During summer, nonbreeding individuals of the species occur com-moniv on the coast of southeastern Alaska (Swarth) and not rarely NORTH AMERICAN GULLS AND THEIR ALLIES. 59 on the coast of British Columbia (Kermode). To this same classshould probably be referred the birds seen at the north end of LakeWinnipeg, June 15-17, 1900 (Preble), July 7-9, 1900, in southernKeewatin (Preble), and the late June birds of the Bay of Fundy(Brewer). Audubon notes that individuals found to be abundantabout the Bay of Fundy in May were birds one year old that on dis-section showed they were not to breed th

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