112997 Leisler’s Bat Nyctalus leisleri Wingspan 30-35cm Medium-sized bat. Recalls Noctule but smaller. Adult has long fur, dark brown above and buffish brown below. Face is blackish. Ears are dark and broadly oval with 4-5 transverse folds; tragus is mushroom-shaped. Wings are dark and narrow. Utters shrill calls in flight. Echolocates in 15-45kHz range. Widespread, mainly in Ireland. Feeds over marshes, meadows and in open woodland. Feeds just after dusk and just before dawn. Flight is fast, wingbeats are rapid. Roosts in tree holes, roof spaces and bat boxes in summer, hibernates in deep tree holes.