Arquivos de Zoologia del Museu de Zoologia da Universidade de São Paolo, Volume 30, Fasciculo 3, 1981. In English. The main subordinate ant-following antbirds south of the eastern Amazon, White-backed Fire-Eyes (Pyriglena leuconota) and north of the eastern Amazon, White-plumed Antbirds (Pithys albifrons) differ in many behavioral aspects despite their similar niches. Line drawings, black & white photos, sound spectrograms, maps. Very good paperback, minor shelf wear.