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 previously carried another dead newborn for 17 days in 2018. Here's what she's taught us about how orcas deal with death.

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