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 .
Macaw
The largest macaws are the hyacinth, Buffon's (great green) and green-winged macaws. While still relatively large, macaws of the genera "Cyanopsitta", "Orthopsittaca" and "Primolius" are significantly smaller than the members of "Anodorhynchus" and "Ara". The smallest member of the family, the red-shouldered macaw, is no larger than some parakeets of the genus "Aratinga".