|
The wire-crested thorntail (''Discosura popelairii'') is a hummingbird which occurs in Colombia, Ecuador and Peru. This species is one of the smallest birds on Earth, with a mature weight of around .〔''CRC Handbook of Avian Body Masses'' by John B. Dunning Jr. (Editor). CRC Press (1992), ISBN 978-0-8493-4258-5.〕 Males measure from in length, against the females' length of around long.〔()〕〔()〕 The male of the eastern slopes of the northern Andes has elongated tail feathers that curve outward and taper from a broad base to a slender tip. The outermost is longest and each successive feather toward the center is shorter. All are steel-blue with white shafts, making a most striking and curious display when spread. The bird has a crest of brilliant green feathers. These birds feed on nectar from flowers using a long extendable tongue, or catch insects on the wing. They require frequent feeding while active during the day and become torpid at night to conserve energy. ==References== * Züchner, T. 1999. Wire-crested Thorntail (''Discosura popelairii''). Pp. 571 in: del Hoyo, J., Elliott, A., & Sargatal, J. eds. 1999. ''Handbook of the Birds of the World.''. Vol. 5. Barn-owls to Hummingbirds. Lynx Edicions. ISBN 84-87334-25-3 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Wire-crested thorntail」の詳細全文を読む スポンサード リンク
|