Delight as dolphins spotted in New York’s Bronx River

Encouraging sign for river that suffered as dumping ground for waste from nearby factories

Dolphins have been spotted frolicking in New York City's Bronx River, an encouraging sign of the improving health of a waterway that was for many years befouled as a sewer for industrial waste.

A pair of dolphins was seen gliding through the river's waters on Monday, the New York City parks department confirmed, near a small park in the city's Bronx borough. The Bronx river rises north of New York City and cuts through the Bronx before terminating in the East River, the estuary that separates the Bronx and Manhattan from the boroughs of Queens and Brooklyn.