CONTENTS 



Introduction 1 



Where Mammals Live 1 



Habitats 3 



Geographical Distribution 6 



Species State-Wide in Occurrence 6 



Species Not State-Wide in Occurrence 7 



How TO Study Mammals 8 



Studying Live Mammals 8 



Making a Collection of Preserved Specimens 9 



Signs 13 



Homes 16 



Burrows 16 



Homes Above Ground 19 



High Trails, Runways, and Slides 20 



Tracks 25 



Kinds of Tracks 25 



Key to Tracks of Some Common Illinois Mammals 25 



Preserving Tracks 26 



Scats or Droppings 26 



Tooth Marks 32 



Food Signs 35 



Animal Remains 35 



Vegetable Remains 35 



Synopsis of Illinois Mammals 35 



How to Use the Keys 36 



Class Mammalia 37 



Checklist of Present Native and Naturalized Mammals 



of Illinois 38 



Key to Orders 41 



Order Marsupialia — Marsupials 44 



Order Insectivora — Moles and Shrews 49 



Order Chiroptera — Bats 63 



Order Carnivora — Carnivores or Flesh Eaters 85 



Order Rodentia — Rodents or Gnawing Animals 123 



Order Lagomorpha — Hares and Rabbits 188 



Order Perissodactyla — Odd-Toed Hoofed Mammals 196 



Order Artiodactyla — Even-Toed Hoofed Mammals 197 



Some Mammals of Prehistoric Times 205 



Mammal Habitats and the Future 209 



Glossary 213 



Bibliography 220 



Some Literature on Illinois Mammals 220 



Some Handbooks on Mammals of the United States 221 



Some Literature on Mammals of States Near Illinois 221 



Index 223 



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