May, 1943 
Poor Duck Foop Sources 
18. River bulrush, Scirpus fluviatilis 
(Torrey) Gray 
American lotus, Nelumbo Jutea 
(Willdenow) Persoon 
Pickerelweed, Pontederta cordata 
Linnaeus 
Marsh mallow, Hibiscus militaris 
Cavanilles 
Southern naiad, Najas guadalu- 
pensis (Sprengel) Morong 
19. 
20. 
a, 
22. 
BELLROSE & ANDERSON: 
Duck Foop PLANTs 433 
Drs 
Wild rice, Zizania aquatica Lin- 
naeus 
Small pondweed, Potamogeton pu- 
sillus Linnaeus 
Long-leaved ammannia, 4Amman- 
nia coccinea Rottboell 
It should be noted that the five lead- 
ing plants, or groups, are moist-soil 
species. The moist-soil plants as a group 
are better seed-yielders than the truly 
aquatic plants and their seeds are more 
readily available to most ducks. 
24. 
DS). 
LITERATURE CITED 
Bellrose, Frank C., Jr. 
1941. Duck food plants of the Illinois River 
valley. Ill. Nat. Hist. Surv. Bul. 
21(8):237-80. Frontis. +35 figs. 
Bellrose, Frank C., and Harry G. Anderson 
1940. Preliminary report on availability 
and use of waterfowl food plants in 
the Illinois River valley. Ill. Nat. 
Hist. Surv. Biol. Notes 15. 14 pp. 
(Mimeographed.) 
Cottam, Clarence 
1939. Food habits of North American div- 
ing. ducks. U. S. Dept. Ag. Tech. 
Bul. 643. 139 pp., illus. 
Martin, A. C., and F. M. Uhler 
1939. Food of game ducks in the United 
States and Canada. U.S. Dept. Ag. 
Tech. Bul. 634. 156 pp., illus. 
McAtee, W. L. 
1918. Food habits of the mallard ducks in 
the United States. U.S. Dept. Ag. 
Bul. 720. 35 pp., illus. 
1939. Wildfowl food plants. Collegiate 
Press, Inc., Ames, lowa. 141pp., illus. 
Pirnie, Miles D. 
1935. Michigan waterfowl management. 
Mich. Dept. Cons., Lansing. 328 pp., 
illus. 
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