It repeatedly ducked its head under the surface and flipped water onto its back, then ruffled its feathers. After about ten minutes it flew up to a tree and straightened its feathers in the sun. Despite this behavior, I would not expect ospreys to visit back-yard bird baths. It will adapt to just about any fishy body of water including lakes, ponds, rivers, reservoirs, estuaries, bays, and lagoons. I have not seen ospreys fishing over ocean waters, and perhaps these are not its prefered hunting grounds, but accounts from the 19th century often describe the birds over the sea.
Ospreys are strong fliers capable of crossing the Mediterranean Sea and the Sahara Desert.
They don't build up large fat stores to help sustain them on migration, instead hunting as they go. Most Northern Hemisphere ospreys migrate south in the fall. North American birds winter in Florida, the Caribbean, on the Gulf Coast, and even to South America. European birds go to African coasts, lakes and rivers, mostly south of the Sahara. Some birds in Florida, the Carribean, Australia, and around the Mediterranean do not migrate.