AUDUBON SOCIETY CHRISTMAS BIRD COUNT DATA 1941
(2,331 observers), compared with 1960, (8,928 observers)

Species                 Count per observer              Ratio
                                     1941                1960               1960/1 941
Eagle .08 .10 1.25
Gull 53.40 72.00 1.33
Raven .29 .30 1.03
Crow 79.59 28.04 .35
Pheasant .88 1.15 1.31
Mourning dove 2.83 2.21 .75
Swatlow 3.18 8.17 2.57
Grebe 6.15 27.14 4.41
Pelican 1.07 3.12 2.92
Cormorant 1.91 1.18 .62
Heron .97 1.82 1.88
Egret .63 1.88 2.98
Swan 7.96 3.81 .48
Goose 78.43 78.04 .99
Duck 916.81 306.85 .33
Blackbird 58.99 2,302.01 39.02
Grackle 10.70 1,407.98 131.59
Cowbird 17.17 368.09 21.44
Chickadee 9.15 6.26 .68
Titmouse 2.16 2.05 .95
Nuthatch 1.81 1.50 .83
Robin 8.41 104.01 12.37
English sparrow 22.80 40.19 1.76
Bluebird 1.60 .77 .48
Starling 90.88 971.45 10.69


Source: "42nd Christmas Bird Count," Audubon Magazine, 1942; and "61st Christmas Bird Count," Audubon Field Notes 15, 1961.