The mottled piculet (Picumnus nebulosus) is a Near Threatened species of bird in subfamily Picumninae of the woodpecker family Picidae.

[2] The population in southeastern Brazil was treated by some authors as a separate species P. iheringi but it is now known to be synonymous with P.

Adult males have a black cap and nape with a red patch on the forehead and white spots on the rest of it.

Their flight feathers are dark brown to blackish with wide pale edges on the secondaries and tertials.

It is found from southeastern Brazil's Paraná state south through eastern Uruguay and into Argentina's Misiones and Corrientes provinces.

[5] The mottled piculet forages in dense vegetation of the understory and also in trees up to about 8 m (26 ft) above the ground.

The mottled piculet's vocalisations are limited to a repetitive "seep" or "cheep", sometimes linked into a brief trill, and an occasional humming sound.