Riding my bike under a freeway overpass I heard some high pitched squeaking coming from above. Skidding to a stop and looking up I saw this group of Pallid Bats (Antrozous pallidus) and Mexican Free-tailed Bats (Tadarida brasiliensis) jam-packed into the weep hole of the bridge. As I peered through the viewfinder I saw one individual Pallid Bat squirm to the front of the group and let out a big yawn.