Apparent survival and return rate of breeders in the southern temperate White-rumped Swallow Tachycineta leucorrhoa

Authors


Corresponding author.
Email: florbulit@ege.fcen.uba.ar

Abstract

Life-histories and demographic parameters of southern temperate bird species have been little studied. We estimated return rates between years and sexes, and adult apparent survival and recapture probabilities with mark–recapture data on White-rumped Swallows and found a lower return rate of unsuccessful females. There was little support for influences of sex or year on survival rates. The estimates were equivalent to the lowest value reported for a northern congener, in contrast to the prediction of geographical variation under life-history theory.

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