The country's first bat survey has identified 12 different species in Norfolk alone.
So far this year, monitoring stations have recorded a quarter of a million bat calls in the hope of finding out more about their habitat and lifestyle.
Click below to see Kate Prout's report:
More top news
There'll be more cloud about today than yesterday but it will be warm. Risk of the odd sharp shower later.
Homes have been evacuated as the Army works to defuse an unexploded World War II bomb discovered near Wembley Stadium.
A new safety system at the Dartford Crossing will turn around vehicles considered too unsafe to travel through the tunnel.