An Eastern Pipistrelle bat was clinging to the outside wall along the stairs to my dentist's office in Richardson. In a state of deep torpor, it didn't take any notice of the people staring at close range, or my camera's flash.

Pipistrelles are the smallest bats in Texas. Note the blunt nose, rather small ears and the 'elbow hooks' the bat uses to hold itself in a vertical position

Inside the ear is a structure called the tragus, used in vertical sound localization.
In this species the tragus is rounded and blunt.