The Tawny-faced Gnatwren (Microbates cinereiventris) is an inconspicuous bird inhabiting lowland forests from Costa Rica in Central America to Peru and Bolivia in northwestern South America. This unmistakable small bird with brown back, withe throat with black streaks, and buffy face, has the appearence of a wren with its very short tail, relatively long, slender bill, and its elusive behavior while moving throughout the thick understory. The Tawny-faced Gnatwren is a very active bird that occasionally gives whiny calls, but it is often difficult to record in the field, so that is still a poorly known Neotropical bird, with most of its life history being a mistery for science. We barely know something about its foraging strategies and habitat use, as well as demography and conservation status. Its nesting biology is known only based on two nests attended by both male and female, and although nest, eggs and nestlings have been described, incubation and nestling periods are still unknown, and other several details of its natural history remain undescribed.