Seventeen subspecies of the American Kestrel are recognized, generally based upon plumage, size, and vocalizations.
This is Falco sparverius caribaearum which is found in Puerto Rico, the Virgin Islands, and the Lesser Antilles down to Grenada.

1st & 2nd photo: Playa Tamarindo, Guánica State Forest, Puerto Rico, 20 January 2026
3rd & 4th photo: Manati Nature Reserve, Manati, Puerto Rico, 15 January 2026