Locations of moose in northwestern Canada with hair loss probably caused by the winter tick, Dermacentor albipictus (Acari: Ixodidae)

Five hundred two trappers representing 389 registered traplines in northern Alberta, northern British Columbia, Northwest Territories and Yukon Territory (Canada) responded to a questionnaire on the occurrence of hair loss and the winter tick (Dermacentor albipictus) on moose (Alces alces). Results suggested that winter ticks may occur as far as 62 degrees N. Several sightings of moose with presumed tick-induced hair loss near Kluane Lake, Yukon Territory, suggest the possibility of introduction of this serious pest into the moose population in Alaska.