Many raptors use these fields as hunting grounds. A pair of ospreys nest on the nearby pole and add more twigs to their home each year. You may hear them chirping loudly and flying off in the direction of the ponds to fish. Red-tailed hawks and northern harriers use these fields as hunting grounds for mice, rabbits and small birds. Male harriers are silver and females are brown, but both sexes can be identified by the white patch on their rump. They hunt by flying low across the fields and hover when they detect their prey. Red-tailed hawks are much larger, fly higher in the sky and, like their name implies, have reddish brown tail feathers.