TABLE E-7, --Trend in waterfowl breeding populations by species, southern Alberta, 1952-61 
{Index numbers, in thousands] 
1952 1953 1954 1955 1956 1958 1959 



Species 















Ducks: 
Dabblers: 
Pintail-----~--------- im 
Mallard-----.--------- ae 
American widgeon----~- a 
Shoveller------------- ae 
Gadwall--------------- xe 
Blue-winged teal------ ee 
Green-winged teal----- am 
Cinnamon teal--------- 
Subtotal--~---------- 
Divers: 
Seaup----------------- 249 
Canvasback------------ a 
Redhead-----~------+--- ti 
Ring-necked duck------ : 
Goldeneye------------- : 
Bufflehead------------ 
Ruddy duck------------ 
Subtotal------=+---+---. 229 
Miscellaneous: | 
ial ia ae ar oa a ey a = - 4 26 32 43 



- 1 
2 2,833 | 2,650 | 2,657 | 3,067 
100 81 44 1h 
TABLE E-8. --Aerial counts of Canada goose breeding pairs and grouped birds, Idaho, 1955-61 
Area 1955 1956 1957 1958 1959 1960 1961 




Total ducks---------- 1 2,069 |* 2,281 |? 2,533 
er an am ae ee 92 168 
+ Incomplete data (minor species not included). 
2 Scoter not included. 


Snake River drainage: 

Farewell Bend to railroad bridge-----------+ 1,223 
Payette River (mouth to Emnett)------------- 284 308 
Strike Dam to American Falls Dam------------ 1A8 199 
North Fork, including Island Park----------- 371 473 
South Fork------+++----------4-5------------- 176 222 
Mud Lake - Camas Refuge area---------------- 298 313 
Gray's Lake area-----------+----------------- 446 401 596 
Blackfoot Reservoir area-------------.------ 411 444 580 

446 
Subtotal --------------- 2-2 en -n nnn nner nnn 2,510 3,133 3,483 3,268 3,816 3,914 
Bear River and drainage: 
Dingle Marsh area---~-----------~--<---- ---- 474 477 71Aé 1,054 1,150 903 1,418 
TOPALGY eewettaws en eee eee buen ners belo 3,340 | 2,987 4,537 4,719 | 5,332 





88 
