538 



Illinois Natural History Survey Bulletin 



Volume 23 



Black duck — continued 



chronology of flight, 344, 355 



feeding habits, 337, 356, 358, 368, 371 



flocking habits, 337, 355 



kill, 354, 358, 362, 366, 367, 369, 370 



laws relating to, 354, 355, 356, 358, 371 



mortality quotient, 339, 343, 344, 345 



population, 356, 368, 369 



density, influence of, 3 54 

 shooting pressure, 344, 345, 354, 355, 367 



quotient, 339, 345 

 vulnerability, 337, 354 



quotient, 339, 370 

 Black gum, 499 

 Black locust, 499 

 Black mallard {see also Black duck) 



kill, 351, 362 

 Black oak, 455, 495, 498, 503, 504, 505, 507, 508 

 Black walnut, 498, 503, 506, 507 

 Blackberry, 497, 500, 510, 521, 531 

 Blackjack {see also Ring-necked duck) 

 kill, 351, 362 

 vulnerability, 340 

 Blue-winged teal ; see also Teal 

 banding, 361 



chronology of flight, 341, 342, 3 55 

 feeding habits, 338 

 flocking habits, 338 

 kill, 351, 354, 362, 366 

 laws relating to, 332, 355, 370 

 mortality quotient, 339, 343, 344, 345 

 population density, influence of, 351, 354 

 shooting pressure quotient, 339, 341, 342, 345 

 vulnerability, 338, 340, 355, 370 



quotient, 339 

 Bluebill {see also Lesser scaup) 

 flocking habits, 339 

 kill, 351, 362 



vulnerability, 337, 339, 340 

 Bluegill, 392-5 



in Chautauqua Lake 



growth, 394 



length, 394 

 in Fork Lake 



growth, 394, 395 



length, 394 



stocking, 395 

 in Grass Lake 



growth, 394 



length, 394 • 



in Horse Shoe Lake 



growth, 394 



length, 394 

 in Illinois 



growth, 395 



length, 395 

 in Onized Lake 



age, 392, 403 



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

 384, 392, 393, 394, 404, 406 



death of, 381 



growth, 392, 393, 394, 395 



Bluegill — continued 



in Onized Lake — continued 

 length, 383, 392, 393 

 weight, 380, 381, 382, 383, 392 

 in Pistakee Lake 

 growth, 394 

 length, 394 

 in Senachwine Lake 

 growth, 394 

 length, 394 

 Bluegrass, 501 



Blunt-nosed minnow in Onized Lake 

 age, 403 



census (catch, yield), 382, 383, 402, 406 

 weight, 383 

 Box elder, 499, 504 



British Columbia, wood duck in, 363 

 Bryant fox squirrel, 516 

 Buckeye, 499 



Buckwheat; sec Climbing buckwheat 

 Bufilehead, 362 



laws relating to, 332, 333, 361, 371 

 shooting pressure on, 361 

 Bullfrog, 377 



Bullheads, 399-400; see also Black bullhead. 

 Yellow bullhead 

 effect on largemouth bass, 385 

 in Onized Lake 

 age, 399 



census (catch, yield), 380, 399, 400 

 length, 383, 399, 400 

 weight, 380, 399 

 Bur oak, 498, 505 

 Burdock, 501, 505 

 Butterball {see also Ruddy duck) 



kill, 351, 362 

 Butternut, 498 



Cache River, 492 



California, waterfowl hunting regulations in. 



331 

 Can {see also Canvasback) 



kill, 362 

 Canada, waterfowl hunting regulations in, 



327, 328 

 Canvasback 



chronology of flight, 3 55 



feeding habits, 339, 340 



flocking habits, 339 



kill, 351, 361, 362, 366 



laws relating to, 332, 355, 361, 368, 371 



mortality quotient, 339, 343, 344, 345 



shooting pressure, 355, 361 



quotient, 339, 345, 361 

 vulnerability, 339, 370 

 quotient, 339 

 Carp 



eff^ect on largemouth bass, 385 

 in Onized Lake 

 age, 403 



