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Redistribution and growth of the Caspian Tern population in the Pacific Coast region of north America, 1981-2000

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Redistribution and growth of the Caspian Tern population in the Pacific Coast region of north America, 1981-2000; 2004; Article; Journal; Condor; Suryan, R. M.; Craig, D. P.; Roby, D. D.; Chelgren, N. D.; Collis, K.; Shuford, W. D.; Lyons, D. E.

Summary

We examined nesting distribution and demography of the Pacific Coast population of Caspian Terns (Sterna caspia) using breeding records and band recoveries spanning two decades since the first population assessment. Since 1980, population size has more than doubled to about 12 900 pairs, yet the proportion of the population nesting at inland (18%) versus coastal sites (82%) has remained constant. Although the breeding range of the Pacific Coast population has expanded northward into Alaska and farther south in Mexico, there was no net latitudinal shift in the distribution of breeding pairs or new colonies. The distribution of breeding birds among areas changed dramatically, however, with 69% of breeding terns now nesting in Oregon [...]

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Type Scheme Key
local-index unknown 70026511
local-pk unknown 70026511
series unknown Condor

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journalCondor
parts
typevolume
value106
typeissue
value4
languageEnglish
citationTypeArticle

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