Unlike their northern cousins, white-cheeked pintails (Anas bahamensis) prefer to feed in salty or brackish water.
They live in the West Indies, South America and the Galapagos and they don’t migrate. The pintails I’ve seen at St. John are year-round residents.
Why leave when you live in a saltwater paradise?
(photo from Wikimedia Commons. Click on the image to see the original.)