Eastern pipistrelles are relatively small and are pale yellowish or pale reddish-brown. In caves, they are often covered with dew drops. This species is usually found roosting singly, sometimes in pairs and rarely in clusters of up to a few to a dozen bats. The forearms are distinctly pink and contrast strongly with the black wing membranes. Ears are small, and the tip of the tragus is rounded. They posture typically appears hunched or rounded. They are common in winter.