Along with flashy dances and distinctive drumbeats, these birds craft their own signature drumsticks to win over mates.
Wild palm cockatoos are a fabulous and fascinating exception. These striking, endangered birds live in parts of northern Australia and New Guinea, and they craft and use tools not to find food, but to find a mate — a rarity that stands out even in primate company., a stick or seed pod, clutched in his left foot . As part of the display, he crafts the instrument himself and the female watches as he snaps off tree branches and whittles them just so.
Heinsohn and his colleagues wanted to see if these rocker birds express their singular style through their instruments, too. Comparing instruments discarded by 12 individual cockatoos revealed what the researchers interpret as evidence for individual preference in their instrument designs. Drumstick length varied more from bird to bird than would be expected by random chance. Some preferred short and stubby drumsticks, while others made longer, thinner ones.
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