Charles Darwin suggested in 1871 that spoken language originated with instinctive sounds, like squeals or yells, which humans then learned to imitate and modify for specific purposes. Now, scientists ...
A superb fairy-wren calls to a Horsfield's bronze-cuckoo. Brood parasites like cuckoos lay eggs in other birds' nests and leave them behind for the host birds to raise. David Ongley / Cornell Lab of ...
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