Mato Grosso, Brazil.
Recent molecular study found this species to form a monophyletic group with C. flavescens and C. elegans#R; has sometimes been treated as conspecific with first of these. Has apparently hybridized, rarely, with C. elegans; described form roosevelti (from W Mato Grosso) considered a hybrid probably between present species and race jumanus of C. elegans#R. Race olrogi very poorly known, said to be more chocolate-brown (rather than blackish) in colour#R than others and differing in size, and is tentatively accepted here; olrogi is a new name replacing castaneus, which is preoccupied#R. Three subspecies currently recognized.
Food and feeding
Status and conservation
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