Prescribed burning in western sagebrush-grasslands has been used primarily to eradicate sagebrush (Artemisia spp.) and, consequently, increase the growth of herbaceous vegetation. Although fire has been used commonly, little is known about its effects on nongame birds breeding in sagebrush-grasslands. Furthermore, the effects of sagebrush removal on arthropod abundance and composition are unknown. To assess the effect of prescribed burning on the foraging ecology of sage and Brewer's sparrows, intensive preburn and postburn data were collected. My objectives were: (1) to document effects of prescribed burning on the general feeding behavior, activity budgets, feeding frequency, and foraging patterns of sage and Brewer's sparrows during the nestling period; (2) to evaluate effects of preburn and postburn foraging strategies on nestling growth and development; (3) to determine foraging preferences in relation to preburn and postburn vegetation and associated arthropods; and (4) to assess arthropod abundance in burned and unburned patches of sagebrush-grassland.