In all seasons, the plumage of the Ruddy Turnstone is dominated by a harlequin-like pattern of black and white.
Breeding birds have reddish-brown upper parts with black markings.
Non-breeding adults are duller than breeding birds and have dark grey-brown upperparts with black mottling and a dark head with little white. 
Juvenile birds have a pale brown head and pale fringes to the upperpart feathers creating a scaly impression.

1st & 2nd photo: Curry Hammock State Park, Marathon, Florida, USA, 26 November 2012
3rd photo: Flamingo Visitor Center area, Everglades National Park, Florida, USA, 24 November 2012
4th photo: Alfred A. McKethan Pine Island Park, Spring Hill, Florida, USA, 25 March 2022
5th photo: Fred H. Howard Park, Tarpon Springs, Florida, USA, 29 March 2022