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emerald toucanet
The emerald toucanet (''Aulacorhynchus prasinus'') is a near-passerine bird occurring in mountainous regions from Mexico, through Central America to northern Venezuela and along the Andes as far south as central Bolivia. Some taxa currently included in this species are sometimes split into separate species (''see Taxonomy'').
==Description==
Like other toucans, the emerald toucanet is brightly marked and has a large bill. The adult is long and weight can range from . The sexes are alike in appearance, although the female generally is smaller and slightly shorter-billed. It is, as other members of the genus ''Aulacorhynchus'', mainly green. The vent and tail-tip are rufous. The bill is black with yellow to the upper mandible (amount depends on the exact subspecies) and, in all except the nominate (''prasinus'') and ''wagleri'' groups (''see Taxonomy''), a white band at the base of the bill. The members of the ''caeruleogularis'' group have a rufous patch near the base of the upper mandible, while some members of the ''albivitta'' group have a rufous patch near the base of the lower mandible. The throat is white in the nominate and the ''wagleri'' group, blue in the ''caeruleogularis'' and ''cognatus'' group, pale grey-blue in the ''lautus'' group, blue or black in the ''atrogularis'' group, and white or grey-blue in the ''albivitta'' group. The eye-ring ranges from blue to red, in some subspecies very dark, almost appearing blackish from a distance. The legs are dull greyish and the iris is dark.
Juveniles are duller, including the throat, and, depending on subspecies, the black areas of the bill are replaced with dusky or the bill is entirely yellowish.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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