P. L. Sclater and Salvin, 1878,
Moyobamba, San Martín, Peru.
Formerly usually treated in Oryzoborus, when often considered conspecific with S. nuttingi, S. crassirostris and S. maximiliani; taxonomy of this group still in flux. Races weakly differentiated, and larger bill of gigantirostris may be individually variable; species perhaps better treated as monotypic. Two subspecies tentatively recognized.
Food and feeding
Status and conservation
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