Birds of Canada, lists all previously known birds seen, whether native, introduced or vagrants and organizes them in each of their respective Canadian provinces and territories. These are based only on the continent of North America and the surrounding ocean waters. The pictures of the official provincial and territorial birds are also shown.
ABA - American Birding Association This site represents an organization that maintains official records of all birds species that have been proven to have been seen inside the perimeters of the North American Continent and the surrounding bodies of water. Regular revised versions are posted to keep the bird list current at all times. This is the list used by all serious birders over their lifetime. You may be aware of the movie called the "Big Year". It was with this list that all the competing birders used in an attempt to set a new record as to how many bird species that could be seen by an individual birder in one calendar year.