Using molt limits from mist netted birds to age Southern Hemisphere passerines on Navarino Island, Chile
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Date
2006
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Abstract
Omora Foundation NGO has been conducting a program of capturing and banding passeriformes of the Magellanic subantarctic forests for the last seven years in Omora Ethnobotanical Park. In order to study age related differences in reproductive success, survivorship, habitat selection etc., easy and accurate methods for determining the age of a bird in the hand are needed. For most Austral South American species this method has yet to be worked out. Here we report on the results of capturing and banding 6702 birds of 21 different species supplemented with information obtained from bird skins in museums in Chile. Data from the extent of the prebasic molt in known aged birds has allowed us to identify the extent of some molt limits in 7 species of 4 families of passerines (_Anairetes parulus_, _Tachycineta meyeni_, _Turdus falcklandii_, _Phrygilus patagonicus_, _Melanodera xanthogramma, _Curaeus curaeus_, _Carduelis barbata_).