As a group, kangaroo rats (Dipodomys) are considered almost exclusively nocturnal. Diurnal activity by kangaroo rats has occasionally been noted, but the anecdotal nature of these accounts suggests it is a rare occurrence. While using video cameras and recorders to collect data on food habits at nests of ferruginous hawk (Buteo regalis) and Swainson's hawk (B. swainsoni) on and near the Rita Blanca National Grassland in 2003 and 2004, we detected numerous D. ordii. We subsequently explored possible relationships between the frequency of capture of D. ordii by these raptors and the time of day and moon phase. We recorded 54 deliveries of D. ordii to 8 of 12 ferruginous hawk nests and 8 of 14 Swainson's hawk nests. D. ordii was captured throughout the course of the day; there were no relationships between hour block of day or moon phase with the number of deliveries. Our review of other diet studies for ferruginous hawk, Swainson's hawk, Harris' hawk (Parabuteo unicinctus), and prairie falcon (Falco mexicanus) revealed kangaroo rats accounting for 1.1 to 6.6% of prey used. In contrast to the prevailing view that kangaroo rats are almost exclusively nocturnal, our data and those from other diet studies of some diurnal raptors suggest kangaroo rats might be more active during diurnal periods than previously thought. Diurnal activity by kangaroo rats might be related to local forage conditions. A more complete understanding of diurnal activity patterns by kangaroo rats will require more focused examination of their behavior in relation to vegetation and climate conditions.