Like many other kestrel species, the Dickinson’s Kestrel has a varied diet that includes rodents, lizards, small birds, frogs, crustaceans, and insects, such as beetles, locusts, and a praying mantis. It often swoops down on its prey from a perch, capturing it on the ground. It might also capture prey after an aerial pursuit.

This species seeks out fires in grasslands in brushy areas, as this is a good opportunity for it to capture insects and small animals that are fleeing the smoke and flames. Researchers have also documented this kestrel following farm equipment for similar reasons – large tractors and other equipment often scare up insects, birds, and other small animals.