Named for a German naturalist who collected in Peru and Brazil in the first decade of the 20th century, Hoffmanns’s Woodcreeper is endemic to southern Amazonian Brazil, where it is confined to the Madeira-Tapajós interfluvium. This species is a relatively large and long-tailed woodcreeper, which is best distinguished from the relevant subspecies of Amazonian Barred-Woodcreeper (Dendrocolaptes certhia) by its more rufous crown, black bill, and finely streaked breast, as well as by song. It occurs in tall terra firme forest, usually the interior, although the species will venture into clearings. Hoffmanns’s Woodcreeper seems to breed in the last third of the year, and it associates with mixed-species flocks, as well as attending army ant swarms, where it sometimes competes for food with various antbirds. The diet is probably mainly arthropods, although more observations are required.