Species: Aedes fitchii


This species may be a problem to people in timbered areas and to livestock on summer pasture in mountainous areas.


Ae. fitchii overwinters in the egg stage. Eggs are laid at the edge of grassy pools or in crevices in beds of previous pools. Larvae often found at the edges of melting snow pools in full sunlight in the spring. Average flight range is about ½ mile. Ae. fitchii has been reported from a wide variety of habitats but the species is most common in semi-permanent bodies of water in open areas that support emergent vegetation. Ae. fitchii is more apt to be collected in swamp habitats than woodland pools. Roadside ditches that support emergent grasses are a common larval habitat.

Identifying Characteristics:

Pointed abdomen, broad pale banding only on basal part of hindtarsomere, wings with pale and dark scales intermixed, palpi with some pale scales, lower mesepimeral setae present, scales of antennal pedicel numerous and almost all pale.

Distribution Map:

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Mosquito and Vector Surveillance Program

MSU Extension - Department of Animal and Range Sciences

Montana State University
P.O. Box 172900
Bozeman, MT 50717-2900

Location: Marsh Labs, Room 59

Veterinary Entomology Research Associate:

Marni Rolston

Professor Emeritus of Veterinary Entomology:

Dr. Greg Johnson


Dr. Grant Hokit (Carroll College)