Is the kestrel the only bird that hovers?

No, the kestrel is not the only bird that can hover. Other species, such as the hummingbird and certain types of raptors like the Merlin and the Osprey, can also hover in place. Hovering is a specialized flight technique that allows birds to maintain a stationary position in the air while scanning for prey or feeding. Different birds have evolved various adaptations that enable this ability.