when do hummingbirds fly south for the winter Hello, welcome to solsarin. This post is about “when do hummingbirds fly south for the winter“. Hummingbird Hummingbirds are birds native to the Americas and comprise the biological family Trochilidae. With about 360 species, they occur from Alaska to Tierra del Fuego, but the vast majority of the species are found in the tropics. They are …