Katydid insects.Tettigoniidae

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Katydids. There are about two thousand species of katydids in the Amazon. They feed on flowers and fruit and are themselves a source of protein to many different kinds of animals.
Just read in Science News that Copiphora gorgonensis katydids have ears below their knees, which are smaller then a grain of rice. They have an eardrum on each leg. Its air pressure on these drums that produce vibrations, that are picked up by sensor cells which detect frequencies. They hear in a similar, but simpler way than humans. How fascinating is that.

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