Bats account for 20% of the known species of mammal. There are almost 1,300 species known worldwide and they are the only mammal capable of true flight.
There are ten species of bat found in Scotland and they are: the soprano or 55kHz pipistrelle (Pipistrellus pygmaeus), the common pipistrelle or 45kHz pipistrelle (P.pipistrellus), Nathusius' pipistrelle (P.nathusii), Brown long eared bat (Plecotus auritus), Daubenton’ s bat (Myotis daubentonii), Natterer’s bat (M.nattereri), whiskered bat (M.mystacinus), the noctule (Nyctalus noctula), Leisler’ s bat (N.leislerii) and Brandt’s bat (M.brandtii).
The most common bats are the pipistrelles and the brown long eared bat, which frequently use houses to roost in. During the summer the females give birth to their young in maternity roosts and they spend the summer there. Around September they leave the summer roosts to mate and to look for good winter roosts as the summer ones will be too warm. As bats hibernate during the winter they need a cold place with a steady temperature in order to survive a period when their food source, insects are far less abundant.
Do I Need A Bat Survey?
Your local planning authority or architect may be requesting a bat activity survey prior to a planning application being approved. If there is the reasonable likelihood any planned works such as building alterations or maintenance work, re-roofing, timber treatment, rewiring or plumbing in roofs could disturb bats or their roosts, then you may have to carry out a bat survey to satisfy the planning authority that your application will not affect bats. Bats are protected all year round whether they are present in the roost or not.