Join Steve Blacksmith from Halifax Scientific Society in the car park at Cromwell Bottom Nature Reserve (Grid Reference SE 124223) at 10.30 for a 10.40 start. Circa 2 mile walk on easy paths around the nature reserve identifying and counting butterfly species with a chance to view the spectacular flowering grasses. Event lasts approximately 3 hours. Free walk but donations welcome to Halifax Scientific Society. Contact the leader for more information on 0771 500 5379. Easy walk, suitable for families with children.