Brazilian Free-tailed Bat

Category: Bats

Bat Call from batcalls.org

Family Molossidae : Tadarida brasiliensis (I. Goef. St.-Hilaire)

Description. A medium-sized bat with broad ears, large feet, and terminal half of tail free; ears broad, extending to tip of snout when laid forward, apparently, but not actually, united across forehead, with a series of wartlike structures on anterior rim; tragus small and blunt; second joint of fourth finger 6-9 mm long; feet with distinct white bristles on sides of outer and inner toes; ratio of foot to tibia about 75; pelage short (3-4 mm) and velvety; upperparts varying from reddish to black; underparts slightly paler; membranes and ears blackish. Dental formula: I 1/2 or 1/3, C 1/1, Pm 2/2, M 3/3 X 2 = 30 or 32. The total number of lower incisors is variable, usually six, sometimes four, occasionally five. External measurements average: total length, 95 mm; tail, 38 mm; foot, 10 mm; ear, 19 mm; forearm, 42 mm. Weight, 11-14 g.