Intensely interesting for scientist and nature lover alike, gathering together much that has hitherto been available in scattered sources. Clear and simple, chockful of information. Not confined to winter data, but including life spans of many creatures. Includes insects, fresh water sponges, hydras, flatworms, planarians, rotifers, freshwater bryozoans, crustaceans, spiders, snails, salamanders, frogs, toads, snakes, turtles, birds and mammals. For libraries, schools, nature shelves.