Old, colorful male yellowhammers, Emberzia citrinella, benefit from extra-pair copulations
Article Abstract:
A high rate of extra-pair copulation and paternity is evident in socially monogamous yellowhammers, with females showing non-random preference for males that are old and more colorful compared to the original pair male. Extra-pair paternity is common in both chicks and clutches, and its frequency is unrelated to the breeding density. Similarly, selection of extra-pair males is unrelated to the effect of density or close neighborhood. Attractiveness, high resistance to parasites, and high survival rates are other characteristics that play a role in selection of extra-pair males.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1996
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Extra-pair courtship behaviour of male budgerigars and the effect of an audience
Article Abstract:
A study was conducted on a socially monogamous bird such as a male budgerigar while breeding in captive flocks to determine the effect of female audience on the male extra-pair courtship behavior. Results showed that males usually engage in extra-pair courtship and copulation when their mates could not observe them. This behavior is lessened when female-mates receive attention from other males.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 1997
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Escape flights of yellowhammers and greenfinches: More than just physics
Article Abstract:
The different angle and speed take-off and reaction times between yellowhammers and greenfinches were studied. Daily changes in mass were found not to affect speed or angle of take-off of attacked. Take-off from predator attacks is likely to be influenced by behavioural as well as morphological aspects.
Publication Name: Animal Behaviour
Subject: Zoology and wildlife conservation
ISSN: 0003-3472
Year: 2000
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