. . Fig. 25. — Sago pondweed, a very important duckfood. (Reduced.) (From Sunset Magazine,February, 1905.) 580 GAME BIRDS. WILD-FOWL AND SHORE BIRDS. eradicates duck food and should never be introduced any-where. It may be exterminated in small ponds by screeningoutlets and inlets and draining the ponds dry. In large lakesits extermination is impracticable. In the western States the wappato is considered among thebest of duck foods. It is a tuber-bearing plant, and althoughI have never had an opportunity to identify the western plant
. . Fig. 25. — Sago pondweed, a very important duckfood. (Reduced.) (From Sunset Magazine,February, 1905.) 580 GAME BIRDS. WILD-FOWL AND SHORE BIRDS. eradicates duck food and should never be introduced any-where. It may be exterminated in small ponds by screeningoutlets and inlets and draining the ponds dry. In large lakesits extermination is impracticable. In the western States the wappato is considered among thebest of duck foods. It is a tuber-bearing plant, and althoughI have never had an opportunity to identify the western plant,this name is given to Sagittaria latifolia, an arrow-head orarrow wort. This and Sagittaria teres are found in ponds ofMassachusetts, and probably are quite as attractive as a duck. Fig. 26. —Tubers of sago pondweed. (Natural size.) (From Circular No. 81, Bureau ofBiological Survey, United States Department of Agriculture.) food as is S. latifolia in the west. The Indians of Oregon usethe tubers as food. Mr. McAtee has identified for Dr. J. C. Phillips anotherduck food which grows in Wenham Lake, and which provesto be quillwort {Isoetes echinospora). Smartweeds {Polygonum) are eaten by many wild-fowl,and certain water grasses are favorite foods of some Wilton Lockwood, who has had much experience in rear-ing wild-fowl, recommends Poa aquatica, a European plantwhich grows naturally here. Probably Glyceria grandis, thereed meadow grass, which somewhat resembles P. aqiiatica,would be equally attractive. It grows along the banks ofstreams and in wet meadows. Wild Geese eat the roots of certain reeds and are very
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