What does the kestrel primarily hunt?

The kestrel primarily hunts a diverse range of prey, including voles and insects in addition to sparrows and starlings. This versatility in diet makes option B the most accurate choice. Kestrels are small falcons that often hunt small mammals and insects, which are abundant in their habitats. Their hunting strategy typically involves hovering in the air, scanning for movement below, and then diving to catch their prey.

While option A mentions sparrows and starlings, it does not include other significant components of the kestrel's diet, such as voles and insects. Option C focuses on larger prey like cottontails and jackrabbits, which are not typically hunted by kestrels due to their size and the hunting abilities of these small falcons. Option D, indicating that none of the answers are correct, does not apply since option B does accurately describe the kestrel's hunting patterns. Thus, option B provides a more comprehensive view of what the kestrel primarily hunts.