Distribution and abundance of pheasants Distribution and abundance of pheasants in Illinois distributionabun47gree Year: 1962 HARVEST OF COCK PHEAS 1950 flV BEST AVERAGE LIGHT f''—V-'- FEW OR NONE 'iimm Fig. 13. — Distribution ' and abundance of pheasants in Illinois as mapped from data obtained from license- stub questionnaires distrib- uted to hunters during the 1950 hunting season (after Marquardt & Scott 1952: 5). in the northeastern counties in the 1920's. That pheas- ants were not common during the 1920's in the area described by Leopold as 'scattering' or 'indeterminate' range was
Distribution and abundance of pheasants Distribution and abundance of pheasants in Illinois distributionabun47gree Year: 1962 HARVEST OF COCK PHEAS 1950 flV BEST AVERAGE LIGHT f''—V-'- FEW OR NONE 'iimm Fig. 13. — Distribution ' and abundance of pheasants in Illinois as mapped from data obtained from license- stub questionnaires distrib- uted to hunters during the 1950 hunting season (after Marquardt & Scott 1952: 5). in the northeastern counties in the 1920's. That pheas- ants were not common during the 1920's in the area described by Leopold as 'scattering' or 'indeterminate' range was substantiated by Robertson (1958:10), who cited the records of amateur ornithologists active in east- central Illinois at that time. Pheasants became increasingly common in eas;- central Illinois during the early 1930's. Yeatter [in Robertson 1958:10) indicated that pheasants were 'relatively well established' in Champaign and adja- cent counties by 1934. Mohr's data (unpublished) based on the number of cocks killed per hunter per county indicated that less than 15 per cent of the hunters residing in the southern and western counties of Illinois were successful in bagging at least one cock pheasant each in 1937, whereas 58-68 per cent of the hunters residing in certain counties of northeastern and east-central Illinois bagged at least one cock each dur- ing the same hunting season. Mohr's map of the pheas- ant kill, fig. 11, shows some westward and southward extension of the pheasant range and the establishment of a center of abundance in Ford and Livingston counties of east-central Illinois. Maps prepared by Robertson (1958:9) for 1948, fig. 12, and by Marquardt & Scott (1952:5) for 1950, fig. 13, from hunters' reports show patterns of distribu- tion of pheasants somewhat similar to those indicated by Leopold and Mohr, but the centers of abundance in northeastern and east-central Illinois show better de- lineation than the earlier maps. They show the southern and the centr
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