Seventeen subspecies of the American Kestrel are recognized, generally based upon plumage, size, and vocalizations.
Cuba has two subspecies: the nominate (North American) species Falco sparverius sparverius (as a wintering migrant species) and the Cuban subspecies Falco sparverius sparverioides (as a resident species) which is the most distinctive, with two colour morphs; one with a red/rufous chest and belly, and the other with a white chest and belly.
The Cuba subspecies is the only subspecies of American Kestrel having two morphs.

1st & 2nd photo: A male, white morph. Caya Coco, Cuba, 14 January 2016
3rd photo: A male, white morph. Soplillar, Playa Larga area, Cuba, 11 January 2016
4th photo: A female, white morph. La Guïra National Park, Cuba, 8 January 2016
5th photo: A male, red morph. Soroa area, Cuba, 7 January 2016