orca, which caught the world's attention in 2018 when it was seen pushing the dead body of its newborn calf for 17 days, it appeared to be grieving again.
The whale known as Tahlequah has lost another calf and is pushing her body again, according to the Center for Whale Research.
This time, Tahlequah was spotted off the coast of the US state of Seattle.
Killer whales have been known to carry dead calves for up to a week, but scientists in 2018 they said Tahlequah set a “record.”
The Center for Whale Research reported the death of any calf is a “tremendous loss,” but adds that the death of Tahlequah's newborn is “particularly devastating” given its history.
The center, which studies the southern resident orca and works to conserve it, said Tahlequah has already lost two of four documented calves — both of which were female.
Both Canada and the U.S. list southern killer whales as endangered.
The whales depend on Chinook salmon – which have been in dramatic decline in recent years – for food.
Reproduction failures are related to nutrition and access to these salmon, according to research from the University of Washington.
Whales can travel an average of 120 km (75 mi) per day.
The sighting of Tahlequah pushing a dead calf in 2018 happened when it was off the coast of Victoria, British Columbia.