Birds' brains need stimulation


Birds with relatively large brains, such as Nanday parakeets, monk parakeets and some cockatoos, are prone to psychological problems in captivity if they don't receive adequate cognitive stimulation from puzzles and other means, according to a study in Proceedings of the Royal Society B. Birds that forage for nuts, seeds and hard-coated insects are the most likely to damage their own feathers in captivity, and they may need intact foods as part of their normal diets, says study co-author Georgia Mason.

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