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Home Maintenance And Repair - 01500564

Bird & Mammal Mites

Bird and mammal mites are often encountered as household invaders during the late spring and summer months. Mites (order Acarina) can be distinguished from their insect relatives by the two body regions (cephalothorax and abdomen), sucking mouthparts, lack of antennae, and four pairs of legs (as adults). The mite life cycle generally consists of an egg stage, a larval stage, one or more nymphal stages, and an adult stage. The entire life cycle requires 1 to 6 weeks (2-3 on the average) for completion.

Bird Mites; the chicken mite and the northern fowl mite are both ectoparasites of poultry and other domestic fowl, as well as many species of wild birds. These mites are commonly found in buildings where bird nests are located around the eaves or in attics. The life cycle is very short, and if conditions are favorable, complete development may occur in 7 days.

Mammal Mites: several species of mites associated with mammals may be found in homes. These include the house mouse mite, the rodent mite and the rat mites. All of these mites are associated with wild or domestic rodent populations. The life cycle of these mites generally requires 17 to 23 days. If these mites are found they almost certainly indicate the presence of a rodent infestation in or around the building.

Other mites found in the home, in addition to the bird and mammal mites, include the house dust mites, clover mites, grain mites and roach mites. Because of the varied habits of the mites found in buildings, it is important to have any mite pest accurately identified.

Integrated Bird & Mammal Mite Management

Although the normal host animals of biting mites are birds and rodents, they will bite humans. This occurs most frequently in the late spring and summer when mite populations are high and when young birds and rodents begin to leave their nests. The hungry mites wander away from these nests in search of food and may be found climbing about on walls, ceilings and bedding. The bites of these mites cause itching, swelling and raised, reddish spots on the skin.

Although standard insect repellents containing diethyl meta-toluamide (deet) will prevent these mites from biting, longterm, continuous use of these products is not recommended.

Effective control of bird and mammal mites is achieved by:
(1) locating and removing bird or rodent nests;

(2) treating infested areas with an appropriate pesticide.

The first step is to locate all bird and/or rodent nests. Search for nests around eaves, in attics, in chimneys, in wall voids, in basements, and around porches and foundations. After locating any nests, but BEFORE removing them, treat with chlorpyrifos. Now, remove any nests and dispose of them (away from the building!). Immediately after doing so, thoroughly treat the infested area. Additional spot treatments in areas where mites are seen wandering (like baseboards) may be helpful. Be sure to initiate any structural changes or sanitary measures needed to prevent re-infestation by birds or mammals.

For a complete listing of suggested control options for all home, yard and garden insect pests contact your local Extension Service, found under local government in the phone book.

Read and follow instructions on the pesticide label. Heed all warnings. Check with your physician if you have any concerns regarding your personal health.


Revised by Tom Ellis, M.S., Department of Entomology

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MSU is an affirmative-action, equal-opportunity employer. Michigan State University Extension programs and materials are open to all without regard to race, color, national origin, gender, gender identity, religion, age, height, weight, disability, political beliefs, sexual orientation, marital status, family status or veteran status. Issued in furtherance of MSU Extension work, acts of May 8 and June 30, 1914, in cooperation with the U.S. Department of Agriculture. Thomas G. Coon, Director, MSU Extension, East Lansing,MI 48824. This information is for educational purposes only. Reference to commercial products or trade names does not imply endorsement by MSU Extension or bias against those not mentioned.

This information.was reviewed as of June 2008.  For more information about the contents please contact for webpage problems .