Mites

Northern Fowl Mite
Northern Fowl Mite may be found on some birds in Ontario. As the name implies, these mites are parasites of birds. When these mites no longer have access to their bird hosts, attacks on humans may occur. These bites can produce an itchy rash in some people. These mites may intrude indoor if there are birds nesting on and in the structure of a house.

The size of fowl mites varies from species to species, but most range between 0.5 and 1.1 mm in length.

The key to controlling bird mite infestations is to identify the source of the mites. In the home, the most common source of bird mites are abandoned birds’ nests near the home or in chimneys and eaves trough. The nest must be removed, and the surrounding area can be sprayed with insecticides.

Source: http://www.uoguelph.ca/pdc/Factsheets/Insect/InsectInvertPestsofHumans.htm