Behaviour and ecology of E. maurus are poorly known. In Venezuela, a female was present in a 15-year-old pine (Pinus caribaea) plantation; original vegetation at this locality corresponds to grass (Trachipoqum) savannahs, in association with swamps dominated by the palm Mauritia flexuosa, gallery forests, and swampy evergreen forests (Sanchez et al. 1992, Best et al. 2001). In Ecuador, this bat was collected in the tropical evergreen forest (Reid et al. 2000). It is insectivorous; it may feed on large insects as with other species of Eumops.

This bat is known from Brazil, Venezuela, Guyana, Suriname, Ecuador and Peru (Sanchez et al. 1992, Reid et al. 2000, Simmons 2005, Eger 2008, Sodre et al. 2008, Pacheco et al. 2009). It is present at elevations below 500 m (Sanchez et al. 1992, Reid et al. 2000). Most of the localities include lowland Amazonian forests, but at least three correspond to savannah formations in Peru and Brazil.

Further studies are needed into the distribution, habitat, ecology, and threats to this species.