CONTENTS 



Page 



Objectives of Project 449 



Methods of Study 45O 



Acknowledgments 453 



Populations 454 



Distribution 454 



Density 455 



Species Ratios 455 



Sex Ratios 458 



Age Classes 45O 



Species Competition 453 



Daily Activity 454 



Seasonal Movements 465 



Local Movements 466 



Migration 466 



Dispersal 467 



Condition 467 



Weight 467 



Length. 470 



Deformities 470 



Wounds 470 



Molt and Color 471 



Parasites and Diseases 471 



Predation 473 



Breeding 473 



Breeding Seasons 474 



Mating Chase 481 



Physiological Aspects 481 



Testes 48 1 



Cowper's Glands 482 



Scrotum 482 



Oestrus 483 



Pregnancy 483 



Gestation 484 



Mammae 485 



Young Rearing 486 



Birth Dates 486 



Birth Sites 487 



Lactation 487 



Development of Young 487 



Litter Size 489 



Illinois Habitats 490 



Black Prairie Habitats 490 



Woodland Habitats 492 



River Bluffs and Bottoms 492 



Wooded Upland 493 



Miscellaneous Habitats 495 



Foods and Feeding 496 



Food Sources 497 



Food Succession 503 



Food Preferences 505 



Storing and Feeding Habits 508 



Minerals 510 



Water 510 



