%0 Journal Article %T Dramatic decline of northern bat Eptesicus nilssonii in Sweden over 30 years %A Jens Rydell %A Johan Ekl£¿f %A Marcus Elfstr£¿m %A Sonia S¨¢nchez-Navarro %J - %D 2020 %R 10.1098/rsos.191754 %X We monitored northern bat Eptesicus nilssonii (Keyserling & Blasius, 1839) acoustically along a 27 km road transect at weekly intervals in 1988, 1989 and 1990, and again in 2016 and 2017. The metho.. %U https://royalsocietypublishing.org/doi/10.1098/rsos.191754