Typical Antbirds (Thamnophilidae)

White-masked Antbird (Pithys castaneus) - HBW 8, p. 672

French: Fourmilier à masque blanc German: Weißmasken-Ameisenvogel Spanish: Hormiguero Castaño

Taxonomy: Pithys castanea Berlioz, 1938, Andoas, lower Río Pastaza, Ecuador-Peru; precise locality not determined, probably in Loreto, Peru.
May prove to be a member of an obligate ant-following clade. Relationships uncertain; retained in same genus as P. albifrons on grounds of similarities in vocalizations, but further study required. Until recent rediscovery, some authors considered that present species might be a hybrid of P. albifrons and some other antbird species. Determination of precise location of type locality problematic, partly because many villages in the region have same name, and also due to changing national boundaries. Monotypic.

Distribution: Lower R Pastaza and lower R Morona, in NE Peru; possibly also in adjacent Ecuador.