Insects not 'hard-wired': Young male crickets grow larger in the presence of abundant male song

Biologists have found that male crickets growing up in the presence of abundant male song tend to be larger, behave differently, and invest nearly 10 percent more reproductive tissue mass in their testes than male crickets growing up in a silent environment. The subtle modifications of behavior depending on the environment, not genes, means that even in insects, animals are not "programmed" or "hard-wired" to do what they do.

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