The killer whale mother, who made headlines with her display of grief in 2018, has given birth again. But researchers have some worries for her new offspring.

Tahlequah, the killer whale who carried her dead calf and swam with him for 17 days, has given birth to her second baby since 2018.

Tahlequah the killer whale made headlines and broke hearts after she was spotted carrying the body of her dead calf for 17 days. This month, sightings of the orca show she has recently given birth again .