Balança-rabo-de-máscara (Polioptila dumicola) - Masked Gnatcatcher - 25-12-2008 - IMG_20081225_9999_43
The Masked Gnatcatcher is found from south-east Pará to northern Argentina where it inhabits light woodland, gallery woodland and scrub such as the chaco where it is quite common.
Male Masked Gnatcatcher, Brasília, Brazil, July 2006
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, shown here in photos 2 and 3, has a black mask bordered below by a thin white line while the female, photo 4, has a much narrower black area, a white eyering and whitish cheeks and lores.
Male Masked Gnatcatcher, Brasília, Brazil, July 2006 - The photo shows a female of the subspecies P. d. berlepschi, a race which is paler grey above and almost white below while the male has a much narrower mask than the nominate race found further south. There is a possibility that two species may be involved.