)[3] Eumops glaucinus is a medium-sized mastiff bat, but its size varies across its range.

The species has a short, shiny pelage of bicolored hairs that are lighter at the bases, and the overall coat color can be black, brown, grayish, or cinnamon.

It lacks a leaf-shaped nose appendage and protruding upper lip, but it has a keel above the eye.

[2] The Florida bonneted bat (E. floridanus) was treated as a subspecies[2] and later elevated to species status.

[3] This bat is common in subtropical and tropical forest habitat, but it has often been recorded living in urban areas, including large cities.

It roosts in the canopies of trees and in cavities in the trunks, including abandoned woodpecker nests.

[2] This species flies high in the air, rarely near the ground, and it can take off from horizontal surfaces.

[2] The origin of E. glaucinus is found in the Blancan of the Pliocene roughly 3.3 million years ago.