Hummingbird
Hummingbirds are birds native to the Americas and constitute the biological family Trochilidae. They are among the smallest of birds, most species measuring in length. Indeed, the smallest extant bird species is a hummingbird, the bee hummingbird weighing less than .
Myiornis
Myiornis is a bird genus in the family Tyrannidae. Discounting the hummingbirds, they are some of the smallest birds in the world.