There are a number of sub-species of the Song Sparrow. This very common sparrow is seen all over North America. The larger Song Sparrow (Aleutian) survives on the outer Aleutian islands. Whereas the dark-plumaged Song Sparrow (Pacific Northwestern) is seen along the Pacific coastlines. Then there is the Song Sparrow (Southwestern), a rufous-coloured Song Sparrow seen in the central regions of the continent. There is also the Song Sparrow (California) and another race described as the Song Sparrow (Eastern) seen in the Atlantic regions.
The Song Sparrow is one of the hardier sparrows seen on the North America continent. There are regular reports of these birds lasting out the cold winter months in Canada and in the northwestern regions of the US. It is seen throughout North America except in the northern tundras. Its song sounds like "Molly put the kettle on".
Avibase - the world bird database This site provides the user with a complete list of bird species, broken down per country, or in the example of the US or Canada, per state and province. Here, bird species names are available in other languages, a great asset to be used as a translation of foreign bird names.
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.
I hope you will take advantage of these suggested websites. I have used each of them, in one way or another, throughout the years in my quest to better identify and understand our fine feathered friends.