Comma

On the last day of our trip to see the family in Warwickshire we went for a walk by the River Arrow and the children paddled in one of the shallow sections. ( see extra) . Poppy did manage to sit down accidentally and I caught that on video but Cameron guided her back for a change of clothes.! 
When I first saw the butterfly I thought it had damaged wings until I looked more closely. A Google search tells me it is a Comma - not one I had heard of I must admit.