Hummingbirds can be found from Alaska down to the bottom of the tip of South America.  Every country in the Americas and all the islands in the Caribbean are home to hummingbirds.  What many people don't know, though, is that they have not found their way to Hawaii.  The nectar-rich flowers there depend upon other birds and insects to pollinate them.  No hummingbirds are found there.  

Hummingbirds have adapted to many different climates.  They are found in tropical rainforests of South America and in the Arizona desert.  They are at home in urban areas like Southern California and high up in the Andes Mountains at elevations seldom visited by humans.  

Anna's Hummingbirds are braving the winter along the Oregon and Washington coasts and into British Columbia.  A scientist from the American Bird Conservancy reported seeing an Andean Hillstar above the snow line at 17,000 feet in Bolivia.

Many migrate to breeding grounds far north of their winter homes.  They have an unbelievable spatial memory, so one that is migrating will remember every place where he/she found food and go there again during the journey.  You can see how even little changes in the environment can affect them.  

Rufous Hummingbirds winter in Mexico and fly yearly as far north as Alaska to breed.  Ruby-Throated Hummingbirds winter as far south as Panama and fly north across the Gulf of Mexico to breed well into Canada.