The river tern is a medium-sized tern, Sterna aurantia, in the family Laridae. It is a migratory species that breeds in the northern hemisphere and winters in the southern hemisphere. The river tern is a piscivore, meaning that it eats fish. It typically hunts by hovering over the water and then diving down to catch its prey.
The river tern is an important part of the ecosystem. It helps to control the population of fish, and it also provides food for other animals, such as eagles and hawks. The river tern is also a popular bird among birdwatchers due to its beautiful plumage and graceful flight.