The Pantanal Snipe has fine streaks on its head and back, with a pale center to its belly. It stays inconspicuous in marshes and muddy places.
The head has stripes and fine streaks, and the back has conspicuous pale stripes. The neck, chest, and flanks are streaked or barred, while the center of the belly is pale and unbarred.
It lives in marshes and muddy places, where its patterned plumage blends with the vegetation.
At Punta Indio, Argentina, 15 nests were found during the 2017–2020 breeding seasons. All were built only from grasses and hidden in vegetation. The 14 completed clutches held two or three eggs. Eggs were brownish-green with brown spots concentrated around the broad end.
The bill is black with a yellow base and the legs are grey-green. The eyebrow and throat are whitish. The central tail feathers are black with a cinnamon band near the tip and white tips.
An extinction-risk assessment has not been added yet.