iter gentills during the breeding season: the role of prey profitability and vulnerability. Ornis Fenn. 74:15-28. TKtL,AVLN, R.B. i977. Peregrine: the private lite ot the Pergrine Falcon. Penzance, U.K. Headland Publica
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关键词
haliaeetus leucocephalus,trains.,bald eagle,mor- tality
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