Sat outside currently, enjoying a wind-down beer... couple of pretty big bats doing energetic laps of the garden with some cool woosh noises thrown in as they jink and jive. Not seen any that big before, plenty of teeny ones 'though. Hazard a guess on type?
Ok, thanks for that - certainly in the ball park size wise and they did clear off as it got later so seems to fit the dusk activity too. Impressive whatever