Of the 338 hummingbird species in the world, 18 are commonly seen in the United States. These spend the winter in Central America and breed in the United States and Canada. Most hummingbirds are only 3 to 4 inches long. Hummingbirds generally weigh between one tenth and one quarter of an ounce. These little flying jewels are always popular in gardens and yards, and their readiness to visit hummingbird feeders makes them a popular subject for bird watchers and photographers alike. Read More