The insect order Orthoptera includes familiar insects like grasshoppers, locusts, crickets, and katydids. The members of this group are readily identified by their strong hind legs which are modified for jumping. Orthopterans are well known for their ability to produce sound. Crickets and katydids sing by rubbing their front wings together; while grasshoppers and locusts scrape their legs against their forewings to produce their songs.
- Borror, D. J., C. A. Triplehorn, and N. F. Johnson. 1989. An Introduction to the Study of Insects. Sixth Edition. Saunders College Publishing, Philadelphia.
- Grimaldi, D. and M. S. Engel. 2005. Evolution of Insects. Cambridge University Press, New York.
- Ingrisch, S. and D. C. F. Rentz. 2009. Orthoptera (Grasshoppers, Locusts, Katydids, Crickets). Pages 732-743 in Encyclopedia of Insects, V. H. Resh and R. T. Cardé, eds. Academic Press, New York.
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