Audubon Society |
|||||||
Christmas Bird Count Data |
|||||||
1941 (2,331 Observers) |
|||||||
vs. 1960 (8,928 Observers) |
|||||||
|
|
|
|
|
|
|
|
Species |
Count |
|
Count/Observer |
Ratio/Observer |
|||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
1941 |
1960 |
|
1941 |
1960 |
|
1960/1941 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Eagle |
197 |
891 |
|
0.08 |
0.10 |
|
1.18 |
Gull |
124,470 |
635,642 |
|
53.40 |
71.20 |
|
1.33 |
Raven |
667 |
2,669 |
|
0.29 |
0.30 |
|
1.04 |
Crow |
185,519 |
250,307 |
|
79.59 |
28.04 |
|
0.35 |
Quail |
2,060 |
10,276 |
|
0.88 |
1.15 |
|
1.30 |
Pheasant |
6,839 |
19,731 |
|
2.93 |
2.21 |
|
0.75 |
Mounring Dove |
7,411 |
72,958 |
|
3.18 |
8.17 |
|
2.57 |
Swallow |
14,347 |
242,303 |
|
6.15 |
27.14 |
|
4.41 |
Grebe |
2,501 |
27,826 |
|
1.07 |
3.12 |
|
2.90 |
Pelican |
4,450 |
10,562 |
|
1.91 |
1.18 |
|
0.62 |
Cormorant |
3,246 |
27,162 |
|
1.39 |
3.04 |
|
2.18 |
Heron |
2,254 |
16,253 |
|
0.97 |
1.82 |
|
1.88 |
Egret |
1,469 |
16,800 |
|
0.63 |
1.88 |
|
2.99 |
Swan |
18,554 |
33,994 |
|
7.96 |
3.81 |
|
0.48 |
Goose |
182,820 |
696,777 |
|
78.43 |
78.04 |
|
1.00 |
Ducks |
2,137,093 |
2,739,517 |
|
916.81 |
306.85 |
|
0.33 |
Balckbird |
137,502 |
20,552,375 |
|
58.99 |
2,302.01 |
|
39.02 |
Grackle |
24,937 |
12,570,458 |
|
10.70 |
1,407.98 |
|
131.61 |
Cowbird |
40,019 |
3,286,314 |
|
17.17 |
368.09 |
|
21.44 |
Chickadee |
21,330 |
55,906 |
|
9.15 |
6.26 |
|
0.68 |
Titmouse |
5,038 |
18,268 |
|
2.16 |
2.05 |
|
0.95 |
Nuthatch |
4,214 |
13,439 |
|
1.81 |
1.51 |
|
0.83 |
Robin |
19,616 |
928,639 |
|
8.42 |
104.01 |
|
12.36 |
English Sparrow |
53,335 |
358,769 |
|
22.88 |
40.18 |
|
1.76 |
Bluebird |
3,742 |
6,903 |
|
1.61 |
0.77 |
|
0.48 |
Starling |
211,836 |
8,673,095 |
|
90.88 |
971.45 |
|
10.69 |
|
|
|
|
|
|
|
|
Sources: |
42nd Christmas Bird Count |
Audubon Magazine , 1942 |
|
||||
|
61st Christmas Bird Count |
|
Audubon Field Notes , 15, 1961 |
Thanks to Dr. J. Gordon Edwards, Professor Emeritus of Entomology
at San Jose State University, for providing this information.
Seriously, thanks for posting that again.