Introduction Avian Brood Parasites lay their eggs in the nests of other birds to reproduce. One hypothesis is that generalist species gives rise to specialist species,  and specialization can lead to new species.   Brown-headed Cowbirds can lay their eggs in the nests of 40 different species, while the Screaming Cowbird or Black-eared Cuckoo may … Continue reading The Evolution of Host Specialization in Avian Brood Parasites →