I think that one of the prettiest of the falcons is the American Kestrel. I would think they are also the smallest of the hawks. They can often be seen close to open fields, either perched on a snag or telephone wire or hovering in search of prey. This one was on a wire. It is a male, identified by the blue-grey on its head and wings. I also caught a shot of it hovering.

Interesting information from 'National Geographic' - https://www.nationalgeographic.com/animals/birds/a/american-kestrel/