When the cuckoo chick hatches, it ejects other eggs or hatchlings to get all the space—and food—for itself. Hungry as a whole brood, the outsize baby devours everything brought by its foster ...

the Australian superb fairy-wren stops feeding the bronze-cuckoo chick and abandons the nest, a strategy that can be outwitted by the right cuckoo call (Nature, 422:157-160, March 13, 2003). Langmore ...