Highlight: Five major plant species were important in stomach and pellet samples of prairie dogs from two different "towns" in western South Dakota: buffalograss (Buchloe dactyloides), scarlet globemallow (Sphaeralceu coccinea), threadleaf sedge (Carexfilifolk), blue grama (Bouteloua gracilis), and western wheatgrass @gropyron smithii). Seasonal differences for spring and summer diets were not significant (P~0.05). During winter pricklypear cactus (Upuntib polyacantha) and western wheatgrass increased in importance in diets and the other major species declined in importance. Three species important in the range but not important in the diet were threeawn (Aristidu fendleriuna and A. bngiseta), prairie dogweed (Dyssodia papposu), and horseweed (Conyza ramosissima).

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