December – January	Hibernating somewhere cool with a constant temperature e.g. underground in  caves, trees etc. on their own or in small groups.
February	Have little fat reserves left.  May look for food and water on warmer nights.
March	Small numbers feeding on warmer nights but in colder conditions still go into a torpid state (semi-hibernation).
April	Mainly out of hibernation and are hungry and active, feeding on most nights. No longer returning to winter roosts but spending day in nearest suitable place.
May	Fully active and feeding. Females forming maternity colonies somewhere warm and dry.  When back in condition females fertilise their egg. Males roosting on their own or in small groups.
June	Females give birth to a single pup (twins are rare) and suckle them.
July	By 3 weeks old young are learning to fly but are still reliant on mothers’ milk
August	At 6 weeks, the young are flying and begin to catch insects for themselves.   Maternity colonies disperse and bats move to mating roosts.
September	Mating season begins (females store the live sperm until the following May) and building up fat reserves for the winter.
October	Mating continues as does building up fat reserves. Looking for hibernation sites.
November	Periods of torpor are lasting longer. Some begin hibernation.

21 April 2016