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The swallow-tailed hummingbird (''Eupetomena macroura'') is a species in the hummingbird family (Trochilidae), found mainly in east-central South America. Most authorities place it in the monotypic genus ''Eupetomena'', although some place it in ''Campylopterus'' based on song and the thick shafts of the males' first primaries.〔 Its common name and specific epithet (which means "large-tailed") both refer to the long, deeply forked, somewhat swallow-like tail. ==Description== With a total length of 15–17 cm (6-6½ in), nearly half of which is made up by the tail, and weighing up to , this is a relatively large hummingbird. Indeed, in much of its range it is the largest species of typical hummingbird. Its wings are also nearly 8 cm long – quite much for its size by hummingbird standards –, though its bill is only of mediocre length, with c. not longer in absolute terms than that of many smaller relatives. Its plumage is brilliant iridescent green, with a blue head, upper chest, tail and vent. The tiny white spot behind the eye, common among hummingbirds, is often not visible in this species, but the white ankle tufts, also common among the Trochilinae, are well-developed. The remiges are blackish-brown. It has a slightly decurved medium-long black bill. The sexes are very similar, but females are about one-fourth smaller and slightly duller than males on average. Immature birds appear like females, but their heads are particularly dull and brownish-tinged.〔 Its voice includes relatively loud ''psek'' notes and weaker twitters. A ''tik'' call is given when excited or alarmed. It is virtually unmistakable, although occasionally confused with the male violet-capped woodnymph (''Thalurania glaucopis''). These have only a blue cap however, the remainder of their head is the same green as the belly. 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「Swallow-tailed hummingbird」の詳細全文を読む スポンサード リンク
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