Dogs often swallow their food so rapidly it seems they barely have time to taste anything, but as every dog owner knows, they are certainly not indifferent to taste. The same is true of birds.Early evidence of a sophisticated gustatory sense in birds was found by John Weir, a bird-keeping colleague of Charles Darwin and Alfred Wallace. He noticed that, when given caterpillars of the ermine moth, his cage birds spat them out and shook their heads in disgust.
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