Although bugs vary greatly in size, color, and physical appearance, they all have piercing-sucking mouthparts in the form of a jointed beak. Most species suck plant juices (e.g., the squash bug and chinch bug); however, some suck the blood of other insects and spiders (e.g., the assassin bug and backswimmer). Others, such as the bedbug, feed on people and other animals. Many of these insects characteristically secrete defensive substances (e.g., the stink bug). The true bugs are classified in the phylum Arthropoda, class Insecta, order Hemiptera.
The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.
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