Motmot

Caspian Tern vs River Tern

Hydroprogne caspia versus Sterna aurantia

Practice

Play a quiz with Caspian Tern and River Tern

Caspian Tern (Hydroprogne caspia) Caspian Tern
River Tern (Sterna aurantia) River Tern

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Caspian Tern · River Tern · My Tricky Birds