The only thing that prevents complete integration of Canadians into American culture is the language barrier.

This group has been important in a silent way all during the history of the country. Unless they are Francophones, you generally wouldn't know who is from Canada.   Millions of USA inhabitants have a Canadian origin.

Not really a certain culture or an enthnic group, but a country made up ofdifferent cultures and ethnic groups like the USA. Nevertheless, an important and life long partner to the States. Do they always see eye to eye? No...but neither do any old friends who grew up together.

Snowbirds. Grr.