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What processes, in terms of biology, are involved on how a Cuckoo manages to produce an egg which looks exactly like the egg(s) of the host bird to which their chick will be part of.
In other words, when a Cuckoo see's an egg of a particular species of bird, how does it manage to create an egg which mimics the exact design, colour and shape of the egg?
how exactly is the information (using the eyes) about the host egg transferred onto the egg the Cuckoo lays into the nest of the host species of bird to which it is replicating?
The cuckoo will return to familiar territory to lay its eggs to that in which it fledged. Therefore the nests it will find will be of the same species to that which raised it.