



Table 1. -- Iowa Waterfowl Counts - Population (1949-1950) Trend Data 
AREA CENSUSED 
Trumbull Lake Round Lake 
(Ruthven Area) (Ruthven Area) 
Clay County Clay County 
Acres 1229 450 
1949 1950 1949 1950 
M F M F M F M F 
Mallard 1 - 2 1 3 l 
Black duck - - z . * ws 
Gadwall - kn ri . cS 
Baldpate N - - os ‘a ms _ 
Pintail oO - - 1 1 1 - 
G-w. teal T - - - - - - 
B-w. teal = - 8 2 4 - 
Shoveler Cc - - “ - - 
Wood duck H = wt 6* 
Redhead E - - - - 
Ringneck Cc ~ - - - - - 
Canvasback K - - - - - - 
Lesser scaup E “ - a - - - 
Golden-eye D 3 i = = - - 
Bufflehead - - - a“ — 3 
Ruddy duck - ~ 14 zZ 2 - 
Merganser - - - - - - 
Total ducks 4 3 25 6 17 
Coot 25 0 74 100 
Florida gallinule - - 1 - 
Pied-billed grebe - - 6 2 
B-c night heron - - - 100 
Upland Plover - - - - 
Snow goose - - - - 

* Sex unidentified 
