4 anyone without a licence to:- 1) Kill, injure or handle a bat. 2) To possess a bat, whether alive or dead. 3) To ring, mark or photograph a bat (except in free-flight). 4) To sell or offer for sale a bat. However, the law does allow you to tend a disabled bat in order to release it, or to kill a seriously injured bat which has no reasonable chance of recovery. The most important provision, however, is that it is illegal to damage, destroy or obstruct access to any place that a bat uses for shelter or protection. The only exception is for bats in the living area of a house. If the bats are unwanted then the Nature Conservancy should be consulted who will advise the householder or if necessary, remove the colony. Bats in houses are a seasonal phenomenon but before explaining their presence in a roof, it is first necessary to understand their physiology. They are the only flying mammals and are worldwide in distribution. They are furry intelligent and social and spend hours grooming daily. They do not breed until their second to fourth year, produce a single baby (exceptionally twins) but not necessarily every year. Clearly then any increase in population will take a long time. Mating occurs in autumn or winter, but females do not become pregnant until the following spring, so that the young are born in June or July. The baby is suckled, can fly at three weeks and is weaned after five weeks,