Bolivia, Brazil, Colombia, Ecuador, French Guiana, Peru, Venezuela.
Amazonia and R Orinoco from eastern Colombia and southern Venezuela south to central Ecuador, north-central and eastern Peru, Amazonian Brazil (east to central Roraima, Amapá and Maranhío, south to northern Mato Grosso and southern Tocantins) and northern Bolivia; apparently absent from Guianan shield with exception of central and eastern French Guiana.
 
Population
Estimated population is unknown (2010).
Long-billed Woodcreeper (Nasica longirostris) [XC525197]
by Mauricio \u00c1lvarez-Rebolledo from PNN Chiribiquete, cunar\u00e9- Am\u00fa, Colombia (?)
Long-billed Woodcreeper (Nasica longirostris) [XC493808]
by Will Sweet from Iranduba, Amazonas, Brazil (song)
Subspecies
No subspecies.
May be ancestral to all Dendrocolaptidae with exception of Drymornis. Birds from localities south of R Amazon having paler upperparts and more tawny underparts sometimes separated as subspecies australis, but differences appear to be attributable to individual variation. By contrast, birds from southern bank have significantly longer bill than those from northern bank, suggesting that recognition of two subspecies may be warranted. Further study is needed.