Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/71249
Type: Artigo de periódico
Title: SEASONAL FLUCTUATION OF THE ORANGE-WINGED AMAZON AT A ROOSTING SITE IN AMAZONIA
Author: de Moura, LN
Vielliard, JME
da Silva, ML
Abstract: We recorded fluctuations in a population of Orange-winged Amazon (Amazona amazonica) during 1 year at a roosting site on an island near Belem, Para, Brazil. Parrots were counted from a boat by a minimum of three teams of two observers, each team oriented in different directions. Orange-winged Amazons were observed flying alone (14.2%), in pairs (75.7%), and small numbers in family groups (pairs with young) of three (8.7%), four (1.2%), or five (0.3%) individuals. The larger number of groups of three compared with groups of four and five individuals reflects the low survival rate of nestlings with generally only one surviving offspring per brood. The total number of parrots increased from April (3,899) to July (8,539), and began to decrease in August (5,351). This decrease was presumably due to onset of the breeding season, when paired individuals leave the roost in search of a nest, where they breed, nest, and rear young until the nestlings can fly. Received 24 January 2009. Accepted 28 August 2009.
Country: EUA
Editor: Wilson Ornithological Soc
Rights: fechado
Identifier DOI: 10.1676/09-013.1
Date Issue: 2010
Appears in Collections:Unicamp - Artigos e Outros Documentos

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