There are at least 23 different types of hummingbird species that have been seen in North America. Most of these hummingbirds are native to the continent, while such species as the Siberian Rubythroat, Cinnamon, Bumblebee, Antillean, Xantus's and the Plain-capped Starthroat Hummingbirds have been seen at one time or another.
The hummingbirds are the smallest-sized bird species in all of the bird families living in North America. These colourful birds pique the curiosity of all who see them. The male bird of each species has the ability to turn its gorget, which is the highly iridescent feathers around its throat and head, into brilliant colours of shiny-like metal plates.
Most often, only the Ruby-throated Hummingbird is seen in the northeastern regions of the continent. The Black-chinned, Anna's, Rufous and the Calliope Hummingbirds are seen along the northwestern areas of Canada into Alaska. The Costa's, Allen's, Lucifer, Rivoli's, Blue-throated, Violet-crowned, Buff-bellied, Broad-tailed, Broad-billed, Berylline, Green Violet-eared and White-eared Hummingbirds, are seen mostly in the southern states and into Mexico.
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.