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
A 12-year-old carer from Colchester has won a national award for looking after her mum.
England captain Dylan Hartley says he's proud of debutant Teimana Harrison's progression to the international stage.
The Bank Holiday Weekend starts fine with some sunshine on Saturday and Sunday. Monday looks more unsettled as rain moves in from the east.