Why do Horsfield's bronze-cuckoo Chalcites basalis eggs mimic those of their hosts?
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...[Show more]
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|Source:||Behavioral Ecology and Sociobiology|
|01_Langmore_Why_do_Horsfield's_2009.pdf||113.82 kB||Adobe PDF||Request a copy|
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