Between January 1976 and June 1978, environmental factors were analyzed to evaluate the fate of 480 dummy nests and 38 Attwater's prairie chicken (Tympanuchus cupido allwaten) nests. Fifty-eight percent of both dummy nests and Attwater's prairie chicken nests were destroyed by predators. Analysis of these data indicated that nest success was affected by density of nests, proximity of artificial environmental factors to nesting areas, and time of year. Vegetation type appeared to have no influence on predation rates. Predation on nests of ground-nesting upland game birds does not appear to be haphazard or random.