Canada - Passport & Nationality - Canadian Citizenship by Descent
In general, you are a Canadian citizen if you were born outside Canada and one of your parents was a Canadian citizen at the time of your birth because the parent was either born in Canada or naturalized in Canada (i.e., the parent was a permanent resident [a landed immigrant] before becoming a citizen). You are the first generation born outside Canada.
You may be a Canadian citizen if you were born outside Canada between January 1, 1947, and April 16, 2009 inclusively, to a Canadian parent who was also born outside Canada to a Canadian parent (you are the second or subsequent generation born outside Canada).