Along the Northeast coast of the United States, right whales are migrating south from their summer feeding grounds in the Bay of Fundy and Nova Scotia to Georgia and Florida. There, they’ll give birth and feed with their young through the winter.

The event draws the interest of whale watchers and researchers. But this year, researchers were delighted to discover something new: right whales swimming near New York City. Right whales have probably passed close to the city before. This time, researchers heard them.