Massachusetts’s occurrence tallies for the North Atlantic right whale hold 216 records, and they aren’t spread evenly through the year. Nearly three-quarters of the yearly total lands in February, March, and April alone, with April by far the single richest month.
Cape Cod Bay’s late-winter gathering
That spring spike matches one of the best-documented feeding events for this species anywhere. From late winter into spring, North Atlantic right whales gather in Cape Cod Bay and along the eastern Massachusetts coastal plain to skim dense swarms of tiny crustaceans near the surface, swimming slowly with their mouths open. Massachusetts sits at the southern edge of a longer migration that runs between calving grounds off the Southeast and feeding grounds farther north in the Gulf of Maine, so the state’s records mark the whale passing through rather than settling in.
A whale built to be missed, and to be hit
No dorsal fin and rough, pale patches on the head are the field marks that separate this whale from others at a distance, but the same slow, near-surface feeding habit that makes it hard to spot also puts it in the path of ships. Massachusetts and federal agencies run seasonal vessel speed restrictions in Cape Cod Bay for exactly this reason, timed to the same late-winter and spring window when the records here peak.
Status in Massachusetts
NatureServe ranks the North Atlantic right whale S1, critically imperiled, reflecting a species reduced worldwide to only a few hundred animals. It’s native to Massachusetts waters, and what shows up here is a small piece of an animal still recovering from centuries of whaling, now facing entanglement and vessel strikes as its main threats.
