Are dark cuckoo eggs cryptic in host nests?
The coevolutionary arms race between cuckoos and their hosts has famously yielded cuckoo eggs that evade host recognition and rejection by mimicking the appearance of the host's own clutch. But not all coevolutionary interactions between cuckoos and hosts have followed the same pathway. Several host species do not show egg rejection even when the cuckoo's egg looks entirely unlike their own. For example, hosts of some Australian bronze-cuckoos, Chalcites spp., routinely accept olive-brown...[Show more]
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