Electric-light Bug, or Giant Water Bug, a water bug named for its habit of flying around electric lights. The insect is 1 3/4 to 2 3/8 inches (4.4 to 6 cm) long. With its forelegs it captures and holds its prey—other insects, snails, tadpoles, minnows, and other small forms of life. The middle and hind legs are adapted for crawling and swimming.

Electric-light bugs are found near freshwater lakes, ponds, streams, and swimming pools throughout the United States and Canada.

The electric-light bug is Lethocerus americanus of the family Belostomatidae and order Hemiptera.