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10 of the largest insects in the world

By: Bryan Nelson on Nov. 10, 2010, 10:30 a.m.
Acteon beetle

Photo: avlxyz/Flickr

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Acteon beetle

Megasoma acteon, another of the giant beetle species in the Amazon rain forest of South America, can reach lengths of more than 5 inches long and can grow as thick as 1.6 inches.

It has a formidable armor like most beetles. In fact, due primarily to its massive size, adult acteon beetles have almost no natural predators.