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Coloration is rich brown to dark brown above and paler below.
Emballonura is the only genus in the family with two pairs of upper incisors. Wing sacs are not present. This species flies before dusk in the highest levels of the rainforest. The usual diet of Emballonura is insects, but fruit is eaten occasionally. During intensive surveys of the Marianas in 1983-84 he located only two groups of about four bats each, both on Aguijan Island.