The Ruby-throated Hummingbird makes its spring migration north based on the appearance of certain flowers along its route. These hummingbirds nest near flower gardens and backyards with trees and feeders. This is the only hummingbird that breeds east of the Mississippi River, although there are 120 species of hummingbirds in North America. By late September, most of the Ruby-throated Hummingbirds depart Cape Cod on a southwesterly course to return to their tropical wintering grounds. This Ruby-throated Hummingbird was recently seen in a flower garden off of Maravista Avenue.