|Adult feeding a juvenile in Rio Grande do Sul, Brazil|
The Snowy-crowned Tern or Trudeau's Tern (Sterna trudeaui) is a species of tern in the Sternidae family. It is found in Argentina, south-east Brazil, Chile, Paraguay and Uruguay. It has occurred as a vagrant in the Falkland Islands. Its natural habitats are swamps, shallow seas, and intertidal marshes.
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