Intrusion into neighboring home range by male Madagascar paradise flycatchers, Terpsiphone mutata: a circumstantial evidence for extra-pair copulation |
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Authors: | T Mizuta |
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Institution: | (1) Department of Zoology, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan Tel. +81-75-753-4075; Fax +81-75-753-4113 e-mail: mizutaku@ci.zool.kyoto-u.ac.jp, JP |
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Abstract: | The seasonal change in home range size and distribution of the male Madagascar paradise flycatcher, Terpsiphone mutata, was studied in deciduous dry forest of the Ampijoroa Forest Station, northwestern Madagascar. Male home ranges were spaced
out in the prebreeding period but overlapped during the breeding period; this change resulted from male intrusion into neighboring
home ranges. Male intrusion was often observed during the prelaying and laying stages of females in invaded home ranges. These
stages are assumed to be in a fertile period of females. Intruder males tended to have longer tails as compared to resident
males. Intruder males may be seeking extra-pair copulations. Females may prefer long-tailed males to short-tailed males as
extra-pair partners, or long-tailed males may be dominant to short-tailed males.
Received: February 17, 2000 / Accepted: April 25, 2000 |
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Keywords: | Madagascar paradise flycatcher Long tails Intrusion Fertile period Extra-pair copulation |
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