A Record Year for North Atlantic Right Whales

North Atlantic right whales are one of three right whale species, and as their name suggests, they reside in the North Atlantic, primarily along the eastern seaboard of the United States and Canada. They are not only some of the largest animals on Earth, typically growing 35 to 50 feet long and weighing up to 70 tons, but are also among the most endangered, with approximately 380 individuals remaining. Of these, only about 70 are actively reproducing females.

Which is why every single female and calf is vital to this species’ population recovery.

Every year starting in November, North Atlantic right whales travel over 1,000 miles to the southeast coastal waters off of North Carolina, South Carolina, Florida, and Georgia to have their young, with the season ending and whales returning to the northeast by mid-April. In the last 25 years, females have given birth anywhere from 0 (2018) to 39 (2009) calves a season, but 2026 was a notably successful season with 23 new calves, the highest number in nearly two decades, and a welcome milestone for a species that has spent much of the last two centuries in decline.

At a glance, 23 calves may not sound like a particularly large number. But for North Atlantic right whales, each calf represents far more than a single addition to the population. But for a female to successfully produce a calf, they must survive years of threats, find sufficient prey, navigate increasingly busy shipping and fishing corridors, carry a pregnancy to term, and then raise her calf through its most vulnerable months. For a population facing ongoing human-caused mortality and injury, every mother-calf pair is a significant conservation success.

In Issue 02 of the Marine Mammal Media Network, we released The Critical Years in Marine Mammal Population Recovery, where we explored how recovery isn’t simply about increasing numbers; it’s about understanding and creating the conditions that allow females to successfully reproduce and their young to survive, mature, and eventually contribute to future generations. The future of any population depends on those early years. Which is what makes the 2026 North Atlantic right whale calving season so encouraging. The 23 calves don’t guarantee a recovery, but they do represent 23 opportunities for future generations and potentially successful calving seasons.

The significance of this year’s calving season becomes even clearer when viewed in the context of the species’ history.

Prior to the commercial whaling era in the mid 19th century, thousands of North Atlantic right whales roamed the Atlantic. However, like many baleen whales that swam slowly, yielded abundant oil, and floated when killed, they were nearly hunted to extinction when the population count dipped below 100 by 1935.

Through an international ban on right whale hunting and their listing under the Endangered Species Act and Marine Mammal Protection Act in the mid-late 1900s, the population slowly increased, reaching a peak of approximately 483 whales by 2011.

Unfortunately, that progress has not continued…

Researchers believe that chronic stress from entanglements, vessel traffic, changing prey availability, and climate-driven shifts in habitat may also be affecting reproduction. Historically, female North Atlantic right whales gave birth every three to four years. Today, the average interval is closer to ten years. This is one of the reasons recovery remains so challenging. In recent years, deaths have often outpaced births, creating a situation where population growth becomes increasingly difficult to achieve.

While North Atlantic right whales remain highly vulnerable to extinction, the 2026 calving season demonstrates that population recovery is still possible when the right conditions exist.

Vessel strikes, fishing gear entanglements, climate change, and shifting prey distributions continue to threaten North Atlantic right whales, and the population remains well below historic levels. This season provides an encouraging reminder that conservation efforts such as vessel speed restrictions, protective policy, ongoing efforts to reduce entanglements, population monitoring, and continued research can make a difference.

It’s also important to note that the success of this year’s calving season does not lessen the need for these protections. If anything, it reinforces why they matter. Every calf born this season represents years of investment in conservation, research, management, and advocacy. Ensuring those calves have the opportunity to survive and eventually reproduce will be just as important as celebrating their arrival.

For now, however, 23 calves is a milestone worth recognizing and a reminder that the future of North Atlantic right whales will depend on the choices we continue to make today.

To see this year’s full lineup of mother-calf pairs, NOAA Fisheries has created a gallery documenting each known pair from the 2026 season.

Thumbnail & Hero: North Atlantic right whale #2642 (Echo) and her fourth calf swimming approximately 22 miles east of Little Saint Simons Island, Georgia. Courtesy of Clearwater Marine Aquarium Research Institute, taken under NOAA permit #26919. Aerial survey funded by NOAA Fisheries and the Georgia Department of Natural Resources.