Birds' eye size offers clues to coevolutionary arms race between brood parasites, hosts

Eye size likely plays a role in the contest between avian brood parasites—birds that lay their eggs in the nests of other species—and their hosts, who sometimes detect the foreign eggs and eject or abandon them, scientists report in the journal Biology Letters.

source https://phys.org/news/2021-09-birds-eye-size-clues-coevolutionary.html