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	Provedor de dados 57 (1) Autor RAGUSA-NETTO,J. (1) Palavra-chave Mixed flock (1) Nuclear species (1) Raptors (1) Sentinel (1) Thraupinae (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2000 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Raptors and "campo-cerrado" bird mixed flock led by Cypsnagra Hirundinacea (Emberizidae:Thraupinae) 57 RAGUSA-NETTO,J.. Bird mixed flocks including Cypsnagra hirundinacea and Neothraupis fasciata as species with sentinels were studied in "campo-cerrado" in order to investigate the possible relationship between alertness and the mixed flock leadership. This study was conducted from March to September 1996 and mixed flocks were observed on average for 2:30h. The time with sentinels were recorded for C. hirundinacea and N. fasciata. The sentinels of Cypsnagra hirundinacea performed most of the vigilance (time with sentinel was on average 42 ± 17%, 41 ± 17% of which by C. hirundinacea, whereas only 1.2 % by N. fasciata) and gave all the alarm calls recorded (54% of the encounters with raptors stimulated alarm calls). A relationship was verified between time with sentinel and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mixed flock; Sentinel; Thraupinae; Raptors; Nuclear species. Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000300011 Registros recuperados: 1 Primeira ... 1 ... Última

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