University of California, Riverside

Insect Pests of Animals

Pests of Horses

Pests of Horses

Biting Midge

Biting midges (Culicoides spp.)

Pest note in Preparation

Black Flies

Black flies (Simuliidae)

Pest note in Preparation 

Canyon Fly

Canyon flies (Fannia benjamini complex)

Canyon flies are significant pests of humans and animals in coastal mountain and foothill habitats of the southwestern United States. The canyon fly group is comprised of seven related fly species within the Fannia benjamini complex... Read more


Eye gnats (Hippelates spp.)

Pest note in Preparation

Face Fly

Face fly (Musca autumnalis De Geer)

Pest note in Preparation

Horn Fly

Horn fly (Haematobia irritans L.)

The horn fly is considered one of the most important pests of pasture cattle. These flies spend most of their adult life on the body of their cattle host. Horn flies have long bayonet-type mouthparts with rasping teeth called a proboscis, which they use to tear through the skin of cattle causing blood to pool at the skin surface. Read more...

Horse and Deer Flies

Horse and deer flies (Tabanidae)

Pest note in Preparation


Horse bot fly (gastrophilus ssp.)

Pest note in Preparation

House Fly

House fly (Musca domestica L.)

The house fly (Musca domestica) is a cosmopolitan pest of humans and domestic animals. House flies are generally found in greatest numbers during the hotter summer months. While commonly associated with animal facilities, house flies can also be common in urban areas where garbage, particularly food waste, is not well managed. Read more...


Mange Mite

Pest note in Preparation


Mosquitoes (Culicidae)

The blood feeding habits of mosquitoes has a significant impact on the health and quality of life for humans, pets and livestock. In some developing countries, individuals can receive 50 to 100 bites per night! When poorly managed, significant numbers of biting mosquitoes will negatively affect economies that depend on outdoor... Read More

Stable Fly

Stable fly (Stomoxys calcitrans L.)

The stable fly is one of the most serious pests of confined livestock. In many areas it is becoming a more serious pest of pastured cattle as well, associated with hay waste residues from the large, round hay bales fed in pastures. Adult stable flies of both sexes require frequent blood meals (often daily) and feed preferentially on the lower body... Read more

More Information

General Campus Information

University of California, Riverside
900 University Ave.
Riverside, CA 92521
Tel: (951) 827-1012

Department Information

Alec C. Gerry, Ph.D.
Assoc. Professor and Extension Specialist

Veterinary Entomology Laboratory 367
University of California at Riverside

Mike Lewis
Website Administrator: