Chorioptes equi

The surface mite Chorioptes occurs on horses and other equids around the world.

Dermacentor albipictus

Dermacentor albipictus (the winter tick or moose tick) is a large reddish-brown to gray-brown tick. In Canada, D. albipictus is found in all provinces and territories, appearing as far north as the southern Yukon.

Dermacentor andersoni -- horses

Dermacentor andersoni is a large reddish-brown to gray-brown tick. In Canada, it is found from central Saskatchewan and west through Alberta and into British Columbia.

Dermacentor variabilis: American dog tick

Dermacentor variabalis is a large reddish-brown to gray-brown tick. In Canada, D. variabilis is found from eastern Saskatchewan and east through to Nova Scotia, primarily in the southern portions of each province.

Eutrombicula species

Trombiculid mites are free-living but their larval stages can infest a range of mammals, birds and people, causing sometimes severe skin lesions characterised by intense pruritus.

Gasterophilus

Bot flies of the genus Gasterophilus infest horses around the world, including Canada.

Otobius megnini

The Argasid (soft) tick Otobius megnini, the spinose ear tick, infects cattle, sheep, dogs, horses and occasionally people in and North America, including Canada, as well as South America, India, and South Africa.

Stomoxys calcitrans — stable fly

The stable fly Stomoxys calcitrans occurs around the world. The life cycle involves egg laying in faeces or decaying and damp organic material, for example straw bedding.