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 .
Vervain hummingbird
It is considered the second-smallest bird in the world after the bee hummingbird. Typical length is 6 cm (2.4 in), including the bill, and weight is . It also has among the smallest eggs in the bird world, with an average length of 1 cm (0.39 in) and weight of 0.375 g.