The Black Skimmer is a coastal bird species that breeds on/around sandy beaches, including in New York City at Breezy Point and potentially other spots in Rockaway. They also feed in and around Jamaica Bay Wildlife Refuge.
Their lower mandible is actually longer if you look closely; they derive their name from this mandible and the associated feeding habit. They fly close to the surface of the water, drop the lower mandible into the water, and snap up small fish. If you ever see a bird near the coast skimming, there is a good chance you have found a Black Skimmer!