The Masked Gnatcatchers (Polioptila dumicola) are endemic to south-east Pará to northern Argentina in South America. They are quite common within their range. Its preferred habitat includes light woodland, gallery woodland and scrub, such as the chaco.
Description:
The nominate sub-species is blue-grey above and a lighter grey below with blackish wings edged white. The tail is black with white outer feathers.
The male has a black mask bordered below by a thin white line.
The female has a much narrower black area, a white eyering and whitish cheeks and lores (the regions between the eyes and bill on the side of a bird's head).
Ref: http://www.arthurgrosset.com/
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