https://www.xaphyr.com/blogs/8....52939/Unleash-the-Ch
The idea indicates that common redstarts are actually parasitised by frequent cuckoos for more time, and so have evolved to get better than the dunnocks at noticing the cuckoo eggs. The cuckoo, eventually, has necessary to evolve much more correct mimicking eggs to successfully parasitise the redstart. In distinction, cuckoos don't appear to have knowledgeable evolutionary strain to produce eggs which closely mimic the dunnock's, as dunnocks do not appear to be equipped to differentiate in betw
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