Formerly isolated as the only species in present genus on basis of forked tail, pointed rectrices and details of bill morphology, the remaining three species being placed in genera Anthoscenus and Lepidolarynx; the distinguishing features, however, vary in a continuum between present species and H. constantii and H. longirostris, with H. squamosus occupying an intermediate position, and treatment of all four as congeners now generally accepted. Monotypic.
C & E Bolivia (from Cochabamba and Tarija), Paraguay and SC & S Brazil (Mato Grosso, Goiás and Minas Gerais to Rio Grande do Sul) S to N Argentina (S to Catamarca, Córdoba and N Buenos Aires) and Uruguay. Single records from extreme SE Colombia (Leticia), NE Ecuador (E Napo) and Acre (extreme W Brazil).
Food and feeding
Status and conservation
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