Dollarbird

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Dollarbird sitting on a stag, Erystomus orientalis
Dollarbird habitually sits on high, exposed vantage point.

Dollarbird (Erystomus orientalis) derived their name from the white patch on the underside of  the wing that resembles the silver dollar coin. In parts of Southeast Asia, they are known by what is literally translated into English as "Stone Myna", presumably due to their close resemblance to many mynas in the area - overall blackish with contrasting orange or yellow bill.  Dollarbird is also referred as the Oriental Roller. Indeed, Dollarbird belongs to the Roller Family (Coraciidae), which in turn gets its name from the birds rolling display flight. 

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