Could you ask him to call me? purchase skelaxin Each circle is divided into sections which are assigned to volunteers to cover by car and by foot in select locations.?? The volunteers identify as many species of birds as they can and also get a count of how many of each they see.?? Later in the day, all section leaders report their sightings to the head compiler for a final tally for the count.?? These results are used by the National Audubon Society, the Cornell Laboratory of Ornithology, and other biologists all of which analyze population trends and migration patterns of the many species of birds.