Long-tailed Woodcreeper vs arapaçu-pardo/pardo-de-mato-grosso

The Long-tailed Woodcreeper and the Plain-brown Woodcreeper can be distinguished by the presence of a weak supercilium and prominent malar stripe in the Plain-brown Woodcreeper. The Long-tailed Woodcreeper lacks these facial markings, making it appear more uniform. Both species have similar overall brown plumage, but the Plain-brown Woodcreeper is more rufescent.

Look for the weak supercilium and prominent malar stripe on the Plain-brown Woodcreeper. Note the more rufescent tone of the Plain-brown Woodcreeper compared to the more uniform Long-tailed Woodcreeper.

The Plain-brown Woodcreeper has a weak supercilium and a prominent malar stripe, and is more rufescent compared to the Long-tailed Woodcreeper, which lacks these facial markings.