Campo Miner measures 11cm long. Sometimes placed in the monotypic genus Geobates, on account of its smaller size, shorter tail and bill, the Campo Miner is almost entirely confined to the Brazilian interior, although its range just penetrates eastern Bolivia. The plumage is generally grayish brown, marked by a striking bright rufous wing patch, which is most obvious in flight. Throughout its range the Campo Miner is dependent on treeless grasslands, although it can perhaps sometimes tolerate degraded areas, and seems especially fond of recently burnt areas, which the species appears to rapidly colonize and start to breed. However, Campo Miner is in many ways poorly known, and there are a number of unanswered questions concerning its life history.