Family feast

时间:2019-03-06 07:13:05166网络整理admin

By Hazel Muir WHY do some animals become cannibals, even though they risk lethal illness as a result? A new study of caterpillars suggests a surprising answer—cannibalism might help some animals avoid hungry predators. Many animals—mostly fish, amphibians and insects—eat their own species, especially when food is scarce. Cannibals improve their chances of thriving by stamping out some of the competition. But sometimes it’s unclear why animals resort to cannibalism. For instance, the army worm Spodoptera frugiperda, a caterpillar that lives on maize whorls in Central America,