 Between New Hare Covert and Swallow Pool there is also an area of grassland, which attracts numerous species of butterfly.The area also has a large population of small mammals such as common shrew, field vole and bank vole, which in turn attract birds of prey such as the common kestrel and short-eared owl.Horsetail Glade, as the name suggests, is home to a large area of giant horsetails.