NDLI: Why do Horsfield’s bronze-cuckoo Chalcites basalis eggs mimic those of their hosts?

Content Provider	Springer Nature Link
Author	Langmore, N. E. Kilner, R. M.
Copyright Year	2009
Abstract	The Horsfield’s bronze-cuckoo (Chalcites basalis) egg closely matches the appearance of its host fairy-wren (Malurus spp.) eggs. Mimicry of host eggs by cuckoos is usually attributed to coevolution between cuckoos and hosts, with host discrimination against odd-looking eggs selecting for ever better mimicry by cuckoos. However, this process cannot explain Horsfield’s bronze-cuckoo egg mimicry because fairy-wren hosts rarely reject odd-looking eggs from their nest. An alternative hypothesis is that cuckoos have evolved egg mimicry to disguise their eggs from other cuckoos. Female cuckoos remove one egg from the nest during parasitism and would potentially benefit by selectively removing any cuckoo egg that has already been laid in the nest because otherwise, their egg will be evicted by the first nestling cuckoo along with the host clutch. We used painted, non-mimetic eggs to test whether cuckoos selectively remove odd-looking eggs during parasitism. We found that they were no more likely to remove a non-mimetic egg from a superb fairy-wren Malurus cyaneus clutch than would be expected by chance. Thus, our study does not support the cuckoo egg replacement hypothesis to explain mimicry of host eggs by cuckoos.
Starting Page	1127
Ending Page	1131
Page Count	5
File Format	PDF
ISSN	03405443
Journal	Behavioral Ecology and Sociobiology
Volume Number	63
Issue Number	8
e-ISSN	14320762
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-03-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brood parasitism Cuckoos Superparasitism Coevolution Egg mimicry Cuckoo egg replacement Behavioural Sciences Evolutionary Biology Zoology
Content Type	Text
Resource Type	Article
Subject	Animal Science and Zoology Ecology, Evolution, Behavior and Systematics

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SOCIALLY ACQUIRED HOST‐SPECIFIC MIMICRY AND THE EVOLUTION OF HOST RACES IN HORSFIELD'S BRONZE‐CUCKOO CHALCITES BASALIS

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Adaptations for Brood Parasitism in Cuculus Cuckoos

Microsatellite loci for population and behavioural studies of Horsfield's bronze-cuckoo (Chalcites basalis: Aves)

Why do Horsfield’s bronze-cuckoo Chalcites basalis eggs mimic those of their hosts?

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SOCIALLY ACQUIRED HOST‐SPECIFIC MIMICRY AND THE EVOLUTION OF HOST RACES IN HORSFIELD'S BRONZE‐CUCKOO CHALCITES BASALIS

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