The Gray Antwren is one of the most widely distributed species in the "gray antwren" group of Myrmotherula, and occurs throughout much of Amazonia. In most populations, the male Gray Antwren is almost entirely light gray, except for the black and white tips to the wing coverts. In two subspecies, from eastern Peru east to central Brazil, south of the Amazon, however, the male has a narrow black patch on the throat. The females typically are nondescript, light grayish brown or cinammon above and buffy below, with no distinct markings. The Gray Antwren is a regular member of mixed species flocks in Amazonia; singles, pairs, or family groups forage in association with other insectivorous birds, including Thamnomanes antshrikes and other species of Myrmotherula antwrens, as well as ovenbirds (Furnariidae), woodcreepers (Dendrocolaptidae) and other species. Gray Antwrens typically forage in the midstory and lower part of the canopy, but there is overlap in foraging height with some other members of these flocks, including with the Long-winged Antwren (Myrmotherula longipennis).