Scientists estimate that only around 500 North Atlantic right whales are alive today. For the most part, they hug the coast, says the New England Aquarium research scientist Philip Hamilton. In the winter, mothers give birth near Florida and Georgia; in the spring and summer the whales feed around New England and Canada. A network of spotters identifies whales by their unique markings and tracks their movements. At the aquarium, Hamilton curates a catalog of every known whale and its sighting history.
Some scientists have nicknamed North Atlantic right whales the “urban whales” because they live so intimately with human cities. Swimming near the coast, they get tangled in nets and struck by ships. Pollution taints their waters and noise stresses them constantly. But Hamilton estimates that a small number of the animals are what he calls “suburban whales.” They pop up now and then in the usual habitats—but otherwise they stay off the grid. “Those animals have lots of mystery about them,” Hamilton says. “We don’t know where they call home most of the time.”
1412 is one of those whales. “She’s been always a favorite of mine,” Hamilton says, rattling off her strange sighting history: 1984, off the coast of New Hampshire, with a calf. Eleven years later, east of Greenland. In 1997, New Hampshire again, with another calf.* 2003, Reykjavik, where an Icelandic whale-watch company got the last photo of her. The long gaps between her sightings are highly unusual. Adding to her intrigue, 1412 is covered in scars. But the scars don’t match the usual patterns from fishing lines and nets, Hamilton says; her wounds may have come from ice.
The reappearance of 1412 this year was especially exciting because of the calf swimming with her. It was a bad winter for whale babies: Only three were born at the calving grounds. In an average year there would be more like 14, Hamilton says. Then, at the end of April, there was more good news: A fifth calf appeared up north. This calf’s mother was another mysterious whale, number 1515. She hadn’t shown up since 2009 and was presumed dead. 1515 has used the calving grounds in the past, Hamilton says, but in between babies she “fully disappears.”
It’s possible that most suburban whales stray only slightly from where scientists usually look. On the other hand, one right whale in the catalog has turned up in the Azores, west of Portugal; another swam to one of the northernmost fjords of Norway. Right whales aren’t known to be very social, so Hamilton says it’s unclear what the whales sacrifice by traveling apart from the group. But they might gain more by being farther away from humans. If suburban whales aren’t where we can spot them, then by definition they must be farther from our noise, ships, and other threats.
Furthermore, right whales’ food sources along the eastern seaboard have been dramatically shifting, probably due to global warming. Whales that swim in unusual places might know about other, better places to find food, Hamilton says. During a reproductive crash in the late 1990s, he notes, at least half of right-whale babies came from suburban moms.