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 .
Amethyst woodstar
The amethyst woodstar's natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist montane forest. At 7.5 cm (3 in) and under 3 grams in weight, this is one of the smallest birds in existence.