Per H. Olsen/Wikimedia Commons
Infamous in the animal kingdom for their method of rearing their young, the cuckoo is another example of a lazy mother. By laying her egg in the nest of another bird, she passes the responsibility of raising the chick to that other bird. The cuckoo usually hatches first, and grows faster, forcing the other chicks out of the nest, where they then die. It then gets the full attention of its adoptive parents, giving it much greater chances of survival
. It is still abandoned in the first place though, making the cuckoo a worthy entrant on our list.