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.

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

There appears to be new heartache for the orca nicknamed Tahlequah after researchers spotted her on Wednesday carrying her new calf on her head, much the way she did another calf six years ago.