This can cause uncertainty with some species such as Pipistrelles. The subsequent Pipistrelles were all built by amateur constructors. Common kingfishers, jackdaws, pipistrelles and Daubenton's bats are seen over the ponds. Members include mouse-eared bats, long-eared bats, pipistrelles, noctules and barbastelles. Noctules are closely related to pipistrelles but can be much larger in size. Mammals included hedgehogs, shrews, mice and bats (pipistrelles), which were common, as were grey squirrels. Soprano pipistrelles will congregate in maternity colonies while they are pregnant and nursing their young. These were found in pipistrelles, the brown long-eared bat, and the whiskered bat.