The Nathusius' pipistrelle closely resembles the common pipistrelle, but is slightly larger and more robust. It can fly large distances between its summer and winter homes. Some Nathusius' pipistrelles fly 1500 to 2000 kilometers from northeastern Europe in order to hibernate in the Netherlands. A bat caught in Friesland was found later in Normandy. Nathusius' pipistrelles also cross the North Sea. A bat found in Friesland had been tagged a year earlier along the English southwest coast.