Mixed Species Flocks
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. The breeding biology, nest success, habitat and behavior of the endangered Saffron-cowled Blackbird, Xanthopsar flavus (Aves: Icteridae), at an Important Bird Area (IBA) in Rio Grande do Sul, Brazil
ABSTRACT The Saffron-cowled Blackbird, Xanthopsar flavus (Gmelin, 1788), is a globally vulnerable icterid endemic to grasslands and open areas, and a priority species for research and conservation programs. This contribution provides information on the population size, habitat, behavior, breeding biology and nest success of X. flavus in two conservation unit
Zoologia (Curitiba). Publicado em: 23/10/2017
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2. Composition of mixed-species bird flocks in forest fragments of southern Brazil
The present study aimed to evaluate the composition of mixed-species bird flocks in a fragmented landscape of the Atlantic Forest in southern Brazil. We recorded 117 species in 218 mixed-species flocks. The correspondence analysis showed two distinct groups of fragments according to degree of connectivity with other fragments. The percentage of original cove
Zoologia (Curitiba). Publicado em: 2009-09
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3. Ecology of interactions between Coragyps atratus (Bechstein, 1793) and Caracara plancus (Miller,JF, 1777) in regions of Uberlândia - MG / Ecologia de interações entre Coragyps atratus (Bechstein, 1793) e Caracara plancus (Miller, 1777) no município de Uberlândia (MG)
Although seldom reported, necrophagy is a relatively common phenomenon in nature. Among necrophagous vertebrates, scavengers are the only ones who have a diet composed almost exclusively by carrion. There are five species of scavengers recorded in Brazil and in some Brazilian regions these species can live in sympatry, interacting with each other and with sp
Publicado em: 2008
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4. Ecologia de bandos mistos de aves em uma paisagem de floresta atlântica no sul do Brasil
O presente estudo avaliou a composição de bandos mistos de aves em uma paisagem de Floresta Atlântica, verificando se há estratificação entre os bandos de acordo com o estrato vertical vegetacional utilizado pelas espécies, e como os aspectos da paisagem influenciam a composição dos bandos mistos. Onze remanescentes florestais localizados na Bacia d
Publicado em: 2008
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5. Composição, estrutura e sazonalidade dos bandos mistos de aves em um remanescente de floresta paludosa no sul do Brasil
Analisou-se a composição, estrutura e padrão sazonal de formação dos bandos mistos de aves em um remanescente de floresta paludosa na planície costeira do Rio Grande do Sul, sul do Brasil. Efetuaram-se amostragens mensais de fevereiro de 2005 a janeiro de 2006, com observações ocasionais em 2004 e janeiro de 2005. Pontos de contagem foram utilizados
Publicado em: 2007
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6. Ectoparasitismo em aves silvestres em um fragmento de mata (Uberlândia, MG)
This work aimed: to determine the prevalence and the parasitic burden of ticks in wild birds; to identify the species of ticks found in those birds; to correlate the occurrence and the parasitic load of ticks with ecological variables of the hosts; and to determine the prevalence of feather mites and of chewing lices in the species of captured birds. The stu
Publicado em: 2005
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7. Avifauna associada ao estuário do Saco da Fazenda, Itajaí, Santa Catarina, Santa Catarina
The estuary is an important feeding and resting site for mixed flocks of coastal seabirds, limnological inhabitants and also edge inhabitants. Once in a month, three census were done on the bird fauna with two hours intervals within observations, during the period from January/96 to December/98. The results showed the presence of 45 species, where 45,7% were
Revista Brasileira de Zoologia. Publicado em: 2000-06
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8. “Spshing Noise”: Biological Significance of Its Attraction and Nonattraction by Birds
Many New World passerine birds, especially migrants which join mixed flocks of local species in the Neotropics, are attracted to a noise termed “spshing” used by humans to attract birds into view. The noise is effective because it mimics the vocalizations of certain bird species which play a central bonding role in mixed species flocks. Migrants join the
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9. Assembly of avian mixed-species flocks in Amazonia.
Diamond's "assembly rules" model posits that competitive interactions among species govern the composition of avifaunas. Although originally applied to islands in archipelagoes, this controversial set of hypotheses is difficult to test because islands differ in habitat and resource availability, colonization history, and stochastic effects. Permanent mixed-s