The rufous-bellied seedsnipe (Attagis gayi) is a bird in suborder Scolopaci of order Charadriiformes, the shorebirds.

[3] The rufous-bellied seedsnipe's specific epithet commemorates the French naturalist Claude Gay.

The nominate subspecies' upperparts have an intricate scallop pattern of rufous-brown and blackish; its underparts are unmarked pale pinkish cinnamon.

Subspecies A. g. latrelillii has a deeper rufous cinnamon than the nominate in its vent area and a scalloped breast.

[2][5] A. g. simonsi is found from central Peru south through northern Chile and western Bolivia into northwestern Argentina.

[4] The rufous-bellied seedsnipe is essentially non-migratory, though southern populations are thought to move to lower elevation in the austral winter.

[4] The rufous-bellied seedsnipe feeds on plant matter, typically in moist areas, but details of its diet are lacking.