Plain Brown Woodcreeper

Dendrocincla fuliginosa

eBird gives this description for the Plain-brown Woodcreeper:  Medium-sized woodcreeper; well-named, all plain warm brown with no streaking. Note face pattern: dark mustache line and pale grayish cheek. Bill rather short for a woodcreeper and all dark. Mainly a forest bird, most often seen accompanying a mixed-species flock. Not usually up in the canopy; prefers lower or middle levels.

The Birds of the World website introduces the Plain-brown Woodcreeper with this descriptive information:  The Plain-brown Woodcreeper has, in the past, included the Plain-winged Woodcreeper (Dendrocincla turdina) known only from the Atlantic Forest of southeastern Brazil. As constituted here, populations of the Plain-brown Woodcreeper (which are subdivided into 11 subspecies) are generally considered to be divisable into two distinct groups: the meruloides group of Central America and northern South America and the fuliginosa group, which is mainly found across eastern and southern Amazonia. The Plain-brown Woodcreeper usually sings only around dawn, and its diet principally comprises arthropods and other invertebrates, although the species has also been observed taking small vertebrates, such as lizards, reasonably regularly. Despite being frequently observed foraging around army ants, Plain-brown Woodcreeper is not an obligate follower of their swarms, as they are also seen feeding alone, with other mixed-species flocks, and in association with troops of monkeys.

I saw my first Plain-brown Woodcreeper at La Selva on the morning of February 7, 2023, as it made its way up the trunk of a tree.