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Phrynops williamsi (known as William's toadhead turtle or William's South American side-necked turtle) is a species of freshwater turtle found in southeast Brazil, Uruguay, and Argentina. This is likely to be a young specimen as it is quite colourful and usually the colour of older specimens fade.
Seen sunbathing on a rock in the river from the footbridge at Iguazu Falls, Argentina.
This turtle was only described in 1983.