They are the largest insects in the world. The Goliath Beetle is the heaviest insect in the world. It's as heavy as three mice and even bigger than some birds. Belostomatidae as largest bug is a family of insects better known as “giant water bugs” or “toe-biters.” Most species in the Belostomatidae family are relatively large (2 cm or more) with some of the largest, such as Lethocerus, exceeding 12 cm, and nearly reaching the dimensions (length and mass) of some of the larger beetles in the world. Well, it's a gigantic cricket-like insect that's also the largest insect in the world. Top 10 Biggest Insects in the World An insect is a very small animal with exoskeleton or a hard, shell-like covering on the outside of its body made up of chitin. The huge aquatic bug has a wingspan of 8.27 inches and has pincers as well as long teeth. The world's largest flying insect has been discovered in China - and it's bigger than a human hand. The A.V. The largest insects that ever lived were dragonfly-like bugs of the order Protodonata, sometimes referred to as griffinflies (a model of which is pictured here). So just have a look and see whether you can identify anyone of them or not. It grows up to 4.5 inches (11.5 cm) and can weigh up to 3.5 ounces (100 grams). Actually, size matters when we talk about the largest one. But insects can be beautiful too, here are some examples. They … BE AFRAID LITTLE HUMANS. Beware! World's biggest insect is so huge it eats carrots Adventurer Mark Moffett has found the world's biggest insect - which is so huge it can eat carrots. The largest insect fossils ever found are griffinflies and giant dragonflies, says Matthew Clapham, a paleobiologist at the University of California, Santa Cruz. A Chinese museum claimed they have bred the world's largest insect. The female stick insect measures 64 centimetres (25 inches) long, the average length of a young man's arm.