With a total population estimated to number fewer than 360 individuals, the North Atlantic right whale is one of the most endangered cetaceans in the world. Its survival hangs by a thread, and the fate of the species depends on our ability to share the oceans with these giants.

[Learn more about the North Atlantic right whale.]

Plump and quite slow, right whales – also known as northern right whales or black right whales – have been heavily hunted for centuries and driven to the brink of extinction. Today, the North Atlantic right whale, which lives primarily along the east coast of the United States and Canada, faces new dangers: entanglements in fishing gear and collisions with ships. In recent years, climate change appears to be altering the habits of the right whale’s prey, resulting in shifts in the cetacean’s migratory patterns. While right whales historically spent the summer in the Bay of Fundy, they have been increasingly venturing into the Gulf of St. Lawrence, where they face new dangers.

Since 2017, 34 carcasses have been found in US and Canadian waters, an exceptional mortality level that cannot be offset by the paucity of births recorded in the same interval. Right whales are currently subject to heightened surveillance and special protection measures. Will this be enough to save this species from the verge of extinction?

Throughout 2021, follow the latest right whale news on this page.

In our archives, retrace the events of 2017, 2018, 2019 and 2020L

2021 news

On Sunday April 25, Fisheries and Oceans Canada spotted the first North Atlantic right whale of 2021 in Canadian waters. While a large number of right whales are still present in Cape Cod Bay (Massachusetts, US), this solitary individual got off to a slight head start over its peers to come feed in the Gulf of St. Lawrence.

The whale, which has not yet been identified, was photographed north of the Magdalen Islands thanks to a Fisheries and Oceans aircraft as part of the active surveillance program being carried out for this endangered species.

This observation triggers the season’s first restriction measures for fishing and navigation in an effort to reduce the risks of entanglements and collisions. A fishing zone spanning approximately 2000 km² was thus closed, and fishermen were requested to recover any stationary fishing gear such as the type used for snow crab. This area will be closed to fishing for 15 days, but if the whale is seen on a regular basis in the same general vicinity, it will remain off limits for the entire season.

Follow right whale detections here: https://dfo-mpo.gc.ca/species-especes/mammals-mammiferes/narightwhale-baleinenoirean/alert-alerte/index-eng.html

Seventeen! Right whale #3593 was spotted a few days ago with calf in tow. This comes as a surprise to scientists who are tracking the North Atlantic right whale population: #3593 has only been seen a few times since being first documented in 2005… and not since 2015! Until now, we did not know her gender and we still do not know her age… or where she spends her summers!

For 2021, there are now 17 newborns for which the mother-calf pair has been formally identified, 16 of which are presumed to be still alive at the time of writing. We can add to this tally the very first calf of the season, whose propeller-lacerated carcass was found in November 2020, but whose mother could not be identified. We can also count the young right whale calf seen in December in the Canary Islands, even if its survival seems unlikely.

These numbers make the current breeding season one of the most prolific in 10 years.

A synopsis of 2021 births can be found here.

After being spotted in difficulty during an aerial overflight, the 16-year-old breeding female Snow Cone (#3560) was partially unravelled from her fishing rope by members of the Center for Coastal Studies Marine Animal Entanglement Response.

The CSS team believes that the whale had been entangled for several months. Even though she was spotted off Massachusetts, it is not clear where the incident occurred. Responders removed over 100 metres of rope, but were unable to cut out the rope stuck in the whale’s mouth, which is probably preventing the animal from properly feeding. The team is hopeful that it can meet up with the whale again in the next few days to complete its intervention.
It’s been a rough year for Snow Cone. This whale gave birth for the first time last season, but her offspring tragically died following a double ship strike.

Source: CSS

Almost a month early, the right whale Millipede (#3520) and her calf have arrived in Cape Cod Bay, Massachusetts, a sheltered feeding area highly popular with the species.

Usually, the first North Atlantic right whales show up in late March or early April, but Millipede was clearly in a hurry to reach her destination.

The pair were last spotted in early February off the coast of Little Talbot Island, Florida. Together, the mother and her young have therefore travelled 1,200 nautical miles up the coast in one month. A perilous journey for this species particularly prone to collisions and fishing gear entanglements.

In fact, the story of Millipede and her lineage speaks volumes about the dangers faced by these whales. Born in 2005, her mother is named Naevus (#2040) and her grandmother is Wart (#1140). Wart lived enmeshed in fishing gear for at least three years before she was released by the CCS Marine Animal Entanglement Response team in 2010. Wart’s daughter Naevus (b. 1990), was documented entangled in rope in August 2010 in the Gulf of St. Lawrence, from which she managed to free herself a few months later. As for Millipede, she survived a collision with a ship when she was less than a year old. She owes her name to the scars left by the propeller on her right side. Her first calf, born in 2013, was not seen again in the months following its birth, and it is unlikely that it survived its northbound journey. We therefore wish her 2021 calf the best of luck!

Source: Center for Coastal Studies

In the span of just a few weeks, two North Atlantic right whale carcasses have been discovered off the coast of the United States. The first one is the carcass of one of this year’s calves, born to the female Infinity, and the second one is that of an adult male nicknamed Cottontail, who had previously been spotted entangled last fall.

These deaths are a painful reminder of the two main threats faced by right whales: ship strikes and entanglement in fishing gear.

Learn more

In anticipation of the return of right whales to Canadian maritime waters this coming spring, the Government of Canada has recently announced the measures for 2021.

Most of the measures implemented in 2020, whether by Transport Canada or Fisheries and Oceans Canada, have been renewed. Compared to last year, the changes made are mainly aimed at improving cohabitation between right whales and fishermen by optimizing where and when fishing zones will be closed in accordance with the presence of whales and by relaxing regulations in shallow areas.

Learn more

“Observed carcasses accounted for only 36% of all estimated deaths between 1990 and 2017. This is the conclusion of a new joint statistical study carried out by teams from NOAA Fisheries and the New England Aquarium. Therefore, between 1990 and 2017, actual mortality is believed to be 2.8 times greater than observed mortality.

Mortality stemming from entanglements in particular is believed to be underestimated. According to the report, “there were substantial differences between the fraction of deaths determined to be entanglement-related during necropsy (49%) and the fraction of cryptic deaths suffering serious injuries related to entanglement (87%).”

Learn more:
Pace, R.M., Williams, R., Kraus, S.D., Knowlton, A.R., Pettis, H.M. “Cryptic mortality of North Atlantic right whales.” Conservation Science and Practice. 2021;e346. https://doi.org/10.1111/csp2.346

The calving season is in full swing for North Atlantic right whales, which are currently in their breeding grounds off the coasts of Georgia and Florida.

As of January 22, 2021, 14 healthy calves had been tallied by researchers, making this year the best reproductive season since 2015. A welcome spark of hope for the species!

In this article, we take stock of these long-awaited and hope-inspiring births.



The North Atlantic right whale named “Minus One”, (catalog number 2430) photographed with her young calf on January 11, 2021 near Ponte Vedra Beach, Florida ©FWC under NOAA permit 20556-01



Casualties and Births

Since 2017, North Atlantic right whales have been experiencing what is known as an “exceptional mortality event”: the number of carcasses found each year is particularly high and seriously threatens the species’ survival. For this reason, the number of deaths, births and entanglements is being closely monitored.

Over the course of this event, authorities have identified 34 carcasses and 15 individuals seriously injured either by an entanglement or a collision and whose survival is uncertain.

(Figures updated March 15, 2021)


Year Mortalities in the US Mortalities in Canada Total
2017 5 12 17
2018 3 0 3
2019 1 9 10
2020 2 0 2
2021 (en cours) 2 0 2
13 21 34

D’après NOAA

Entanglements and severe injuries

The country indicated corresponds to the location where the entangled or injured animal was initially observed and may not be representative of the location where the incident occurred.

2017: 2 entanglements (1 in Canada, 1 in the US)

2018: 5 entanglements (2 in Canada, 3 in the US)

2019: 1 entanglement (Canada)

2020: 3 entanglements and 1 collision (US)

2021 (to date): 2 entanglement and 1 collision (US)


Season (winter of year…) Number of calves tallied
2009 39
2010 19
2011 22
2012 7
2013 20
2014 11
2015 17
2016 14
2017 5
2018 0
2019 7
2020 10
2021(en cours) 17

Figures taken from the North Atlantic Right Whale Consortium 2020 Annual Report Card. Pettis, H.M., Pace, R.M. III, Hamilton, P.K. 2021.



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Laure Marandet

Laure Marandet has served as editor for the GREMM since early 2020. Convinced that the conservation of species is contingent on a better understanding by the general public, she has been passionate about popularizing science for over 15 years. Her strengths: a dual degree in biology and journalism, an insatiable curiosity, a child-like love for the animal world, and the patience necessary to draft texts that are both clear and precise.

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