Willow Tree Fen organised by Lincolnshire Wildlife Trust. Experts from Lincolnshire Bat Group accompanied a group around the reserve with bat detectors. It was a beautiful crisp October evening and we heard two pipstrelle bat echo locating on site. Our guides told us that bats go into hibernation as the weather starts to cool although it is still possible to pick them up on warmer evenings at this time of year. A moth trap was set up on site and we were able to see moths and other insects attracted to the light. The evening was rounded off with hot chocolate and toasted marshmallows around a camp fire.