Tahlequah, the Southern Resident orca who carried her dead calf for 17 days in 2018, is mourning the loss of another newborn, raising concerns about her health.

The calf was born in late December. Observing researchers noted unusual unspecified behaviors by mother and calf that led them to worry for the young whale’s health.

Tahlequah, an orca whale who carried her dead calf for 17 days in 2018, is grieving another loss. On Jan. 3, researchers confirmed that Tahlequah lost another calf and is once again carrying her baby's body through the ocean,