at the bottom of the bat house on a warm afternoon.
Big brown bat (Eptesicus fuscus) enjoying some outdoor ventilation from the hot interior of the bat house. Look closely, there are two other individuals on the back wall. Believe it or not, they will not occupy a shaded bat house as they prefer it hot, a major reason why some bat houses fail to attract bats.
Bats need friends! Here’s a free on-line booklet (.pdf) with plans to build bat houses and it explains how to locate them properly so that bats will find and occupy their new summer home.