Fish, dragonfly nymphs and diving beetles are natural predators of mosquito larvae, while dragonflies, birds and bats feed on adult mosquitoes. In some states, the mosquito-eating fish, Gambusia (closely related to guppies), are often reared in large numbers and released in mosquito breeding sites. Gambusia, native to the southern United States, feed on many kinds of insect larvae, but prefer wrigglers and other top feeders. Your local Division of Wildlife should be consulted for restrictions and regulations on fish releases before using this mosquito control method. The Gambusia can displace the natives. Fish native to the U.S. that feed on mosquito larvae include fathead minnows, fingerling trout and fingerling bluegill. Fingerling bluegills are recommended where sport fisheries exist.

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