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 .
Melanocharitidae
The berrypeckers and longbills are small to very small songbirds. They range in length from in the case of the fan-tailed berrypecker to in the case of the pygmy longbill, which is the smallest bird in New Guinea. The berrypeckers ("Melanocharis") are usually bigger than the "Toxorhamphus" and "Oedistoma" longbills. The females of two species, the fan-tailed and streaked berrypecker, are unique amongst songbirds in that they exhibit a reversal in the usual pattern of sexual dimorphism, with the females being both longer and heavier. For example in the fan-tailed berrypecker the male weighs , whereas the female weighs .