542 



Illinois Natural History Survey Bulletin 



Vol 



ume 



23 



Gray squirrel — continued 

 breeding, 451, 473, 530 

 mating chase, 481 



physiological aspects, 481 



seasons, 474 

 color, 471 



competition, 464, 529 



crippling, 518; see also wounds {below) 

 deformities, 470, 530 

 den boxes, 522 

 diseases, 471 

 dispersal, 467 



foods and feeding, 496, 531; see also man- 

 agement {beloiv) 

 habitats; see Illinois habitats {beloiv) 

 hunting, 455, 516; see also kill {beloiv) 



methods, 516 



seasons, 524 

 Illinois habitats, 455, 490 

 importance, 449 

 kill, 519, 531 

 length, 470, 530 

 litter size, 489 

 local movements, 466 

 management, 520 

 migration, 466 

 mineral requirements, 510 

 molt, 471, 530 



nesting, 510, 531; see also den boxes {above) 

 parasites, 471 

 populations, 454, 495 



cycle, 455 



density, 451, 455, 529 



distribution, 454 

 predation on, 473 

 seasonal movements, 465 

 sex ratio, 451, 458, 529 

 species ratio, 451, 455, 529 

 storing habits, 508 

 water requirements, 510 

 weights, 460, 467, 530 

 wounds, 470 ; see also crippling losses 



{above) 

 young rearing, 486, 530 

 Great Britain, squirrel investigations in, 466 

 Greater scaup, laws relating to, 332 

 Green sunfish, 397—8; see also Sunfish 

 in Michigan 



growth, 398 



stunting, 398 

 in Onized Lake 



age, 397, 403 



census (catch, yield), 380, 381, 382, 383, 

 384, 397, 398, 406 



growth, 397, 398 



length, 383, 397, 398 



weight, 380, 381, 382, 383, 397 

 Green-winged teal {see also Teal) 

 banding, 361 



chronology of flight, 342, 355 

 feeding habits, 338 

 flocking habits, 338 



Green-winged teal — continued 

 kill, 351, 354, 362, 366 

 laws relating to, 332, 355, 371 

 mortality quotient, 339, 343, 344, 345 

 population density, influence of, 3 54 

 shooting pressure, 342 



quotient, 339, 345 

 vulnerability, 338, 355, 370 

 quotient, 339 



Gymnocladus dioicus, 499 



H 



Hackberry, 499 

 Half-wing geometer, 503 

 Hawk, 473 



Hawthorn, 497, 500, 520 

 Hazelnut, 500, 504, 505, 507 

 Helione injections and feeding; see Elm 

 Helminth worms, 471 

 Hepatic coccidiosis, 473 



Hickory, 455, 464, 465, 466, 489, 490, 492, 493, 

 496, 497, 505, 507, 508, 509, 513, 520, 

 522, 523, 525, 531, 532; see also specific 

 references 

 Honey locust, 499, 504 

 Hoplopleura sciuricola, 472 

 Horse chestnut, slime flux of, 408 

 Horse Shoe Lake, 394 

 Horse Shoe Lake Game Refuge, 509 

 Hudson River, 466 

 Hunting 

 illegal, 358 

 public, 368 

 regulations; see Squirrel, Upland game, 



Waterfowl 

 seasons 



on ducks ; see Duck 

 on squirrels; see Squirrel 

 zones 



for squirrels; see Squirrel 

 for waterfowl; see Waterfowl 

 Huro salmoides, 385-8; see also Largemouth 



bass 

 Huron River (Michigan), 401, 402 



Illinois 



game code, 333 



squirrel hunting regulations in, 525 

 waterfowl hunting regulations in, 327—72 

 wood duck in, 362, 363, 364 

 Illinois River, 328, 333, 339, 357, 362, 364, 365, 

 492, 505 

 valley, 333, 338, 339, 342, 343, 351, 353, 355, 

 356, 362, 363, 365, 366, 368, 369, 371 

 Illinois State Department of Conservation, 



333, 365, 367, 449, 454, 519 

 Impalaia, 472 

 Indiana 



black squirrels in, 471 



