The eponym for the species name "gallagheri" was Major Michael D. Gallagher, who collected the holotype.

[3] It is unique in its family due to the presence of large, paired "nasal inflations" similar to those found in the mouse-tailed bats.

Based on other members of its genus, it is hypothesized that Gallagher's free-tailed bat forages for insects at relatively high altitudes with a fast but not maneuverable flight.

[1][3] The holotype was collected in the Scierie Forest, approximately 30 km (19 mi) southwest of Kindu, Democratic Republic of the Congo.

[3] It is nocturnal, possibly roosting in hollow trees, rock crevices, or caves during the day.