Abstract
1. Nine species of insectivorous bats in southern Sweden were monitored with a bat detector to assess which species regularly forage around streetlamps and which do not. Only the fast-flying species that use long-range echolocation systems (Nyctalus noctula, Vespertilio murinus, Eptesicus nilssonii and occasionally Pipistrellus pipistrellus) did, whereas Myotis spp. and Plecotus auritus did not. 2. Bats foraging near streetlamps were monitored with a bat detector from a car. Bat density along illuminated roads was 1-5 km −1 . More than 90% of the bats detected were E. nilssonii
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