sonar

Blue whale Balaenoptera musculus illustration from A Life on Our Planet by David Attenborough

Pipistrelle Pipistrellus pipistrellus in flight

Whiskered bat Myotis mystacinus hat portrait showing long fur and sharp teeth

Pipistrelle Pipistrellus pipistrellus in flight

Portrait of a Natterer’s bat head Myotis nattereri

Lesser Horseshoe bat Rhinolophus hipposideros in flihgt revealing domething of its complicated facial and nose structure

Daubenton’s bat Myotis daubentonii in flight with open mouth, cut to white