An endangered orca mother has been carrying her dead newborn calf on her snout for nearly a week around Washington’s Puget Sound.

The calf was born Dec. 24. Observing researchers noted unusual unspecified behaviors by mother and calf that led them to worry for the young whale's health.

Tahlequah, an orca that carried her dead calf for 17 days and more than 1,000 miles in 2018, lost another calf recently and is grieving the death in a similar way.