These are CT-114 Tutors. The only ones in the Canadian Air Force since 2000 are Snowbirds.
Airplanes - Military - Parked - Utility
Officially known as the Canadian Forces 431 Air Demonstration Squadron, the Snowbirds are Canada's military aerobatics or air show flight demonstration team whose purpose is to "demonstrate the skill, professionalism, and teamwork of Canadian Forces personnel". The squadron is under the jurisdiction of the Canadian Forces Air Command and is based in CFB Moose Jaw, near Moose Jaw, Saskatchewan. The Snowbirds are the first Canadian air demonstration team to be designated as a squadron.
Links: en.wikipedia.org, www.airliners.net