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Craveri's murrelet
Craveri’s murrelet (''Synthliboramphus craveri'') is a small seabird which breeds on offshore islands in both the Pacific Ocean and the Gulf of California off the Baja peninsula of Mexico. It also wanders fairly regularly as far as central California in the USA, primarily during post-breeding dispersal. It is threatened by predators introduced to its breeding colonies, by oil spills, and by tanker traffic. Increasing tourism development and commercial fishing fleets also further threaten the species. With an estimated population of 6,000-10,000 breeding pairs, its population is listed as vulnerable.
==Description and range==
The Craveri’s murrelet is a small black and white auk with a small head and thin sharp bill. It resembles the closely related Xantus's murrelet, with which it shares the distinction of being the most southerly living of all the auk species. The Craveri’s murrelet has a partial neck collar (Xantus’s has none), and dusky underwings (Xantus’s has white underwings). Craver’s black face mask dips a bit further down the face compared to the Xantus’s. Both species can be also separated by voice.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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