Calculation of dermal exposure in mg/kg bw under different assumptions of flight speed, time in spray cloud, species and for the Even Distribution, TIM Method, and Drift Area models for a hawker (Pipistrellus pipistrellus) and a ground gleaner bat (Myotis myotis). See text for further details. The following parameters were used for the calculations: P. pipistrellus – body weight of 5 g, body diameter of 0.03 m, wing length of 0.105 m (wing span of 0.24 m/2 minus half of body diameter of 0.015 m) and wing angle of 60°, M. myotis: body weight of 29 g, body diameter of 0.07 m, wing length of 0.17 m (wing span of 0.43 m/2 minus half of body diameter of 0.035 m) and wing angle of 90°. Flight speeds of 2 m/sec and 4 m/sec were assumed for slow and fast flying bats, respectively. The Hawker/Foliage Gleaner was ignored being intermediate in all cases between the other two species