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Indian roller
The Indian roller (''Coracias benghalensis''), is a member of the roller family of birds. They are found widely across tropical Asia stretching from Iraq eastward across the Indian Subcontinent to Indochina and are best known for the aerobatic displays of the male during the breeding season. They are very commonly seen perched along roadside trees and wires and are commonly seen in open grassland and scrub forest habitats. It is not migratory, but undertakes some seasonal movements. The largest populations of the species are within India, and Several states in India have chosen it as their state bird.
==Description==
The Indian roller is a stocky bird about 26–27 cm long and can only be confused within its range with the migratory European roller. The breast is brownish and not blue as in the European Roller. The crown and vent are blue. The primaries are deep purplish blue with a band of pale blue. The tail is sky blue with a terminal band of Prussian blue and the central feathers are dull green. The neck and throat are purplish lilac with white shaft streaks. The bare patch around the eye is ochre in colour. The three forward toes are united at the base. Rollers have a long and compressed bill with a curved upper edge and a hooked tip. The nostril is long and exposed and there are long rictal bristles at the base of the bill.〔
Three subspecies are usually recognized. The nominate form is found from West Asia (Iraq, Arabia) east across the Indian Subcontinent, and within India north of the Vindhyas mountain ranges. The subspecies ''indicus'' is found in peninsular India and Sri Lanka. The southern form has a darker reddish collar on the hind neck which is missing in the nominate form. The race ''affinis'' of northeastern India and Southeast Asia (Thailand, Myanmar, Indochina) is sometimes considered a full species, but within the Indian region, it is seen to intergrade with ''benghalensis''. The form ''affinis'' is darker, larger and has a purplish brown and unstreaked face and breast.〔 It has underwing coverts in a deeper shade of blue.〔
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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