19 gleaned about the natural history of the species and of the individuals being tracked, and can often facilitate observation of the animals them- selves . The indications denoting the presence of a species in an area include tracks, trails, runs, droppings, feeding remains, hair on fencings dwellings etc. When evidence of an animal is first found attempts should be made to find further signs at or near the site to aid identification. Careful recordings of size, shape, nature of tracks, droppings etc., together with details of habitat should be made in the field. To assist in identification of evidence collected, there are a number of useful books on the subject. There is the usual range catering for the need of the general enthusiast to the dedicated mammalogist. One of the standard texts giving an excellent account of the tracks and signs of most British mammals is the "Collins' Guide to Animal Tracks and Signs". Another book entitled "Mammals of Britain. Their Tracks, Trails and Signs" (Blandford Press) is a useful well established field guide with excellent sections on skeletal remains with useful keys to aid identification and also includes data on the occurrence, habits, habitat and dwellings of our mammals. More especially for the younger