Definition of Goliath beetle

The Goliath beetles are among the largest insects on Earth, if measured in terms of size, bulk and weight. They are members of subfamily Cetoniinae, within the scarab beetle family. Goliath beetles can be found in many of Africa's tropical forests, where they feed primarily on tree sap and fruit. Little appears to be known of the larval cycle in the wild, but in captivity, Goliathus beetles have been successfully reared from egg to adult using protein-rich foods such as commercial cat and dog food. Goliath beetles measure from 50–110 mm (2 to 4-1/3 inches) in length as adults, and can reach weights of up to 80-100 grams (3 to 3-1/2 oz) in the larval stage, though the adults are only about half this weight. The heavily armored adults are so large that when flying, they produce a sound akin to a toy helicopter in flight. The females range from a dark brown to silky white, but the males are nomally brown/white/black or black/white.