Entomology definition of Canadian zone: is that part of the boreal region
comprising the southern part of the great transcontinental
coniferous forests of Canada, the northern parts of Maine, New
Hampshire and Michigan, and a strip along the Pacific Coast
reaching south to Cape Mendocino and the greater part of the high
mountains of the United States and Mexico. In the east covers
Green. Adirondack and Catskill Mountains and the higher mountains
of Pennsylvania, West Virginia, Virginia, western North Carolina
and eastern Tennessee. In the Rockies extends continuously from
British Columbia to western Wyoming and in the Cascades from
British Columbia to southern Oregon with a narrow interruption
along the Columbia River.