's endangered southern resident killer whales. The video, shot Thursday near Vachon Island in Washington state, shows the calf swimming next to the killer whale known as L77, who had previously been pregnant. Watch helicopter video of the young calf swimming beside its motherHelicopter footage from Washington State shows a new southern resident killer whale swimming beside L77 0:59The southern residents have not had a successful pregnancy in three years. The sighting follows ominous news about the West Coast's southern resident killer whale population in recent weeks. Scientists say the killer whales have been struggling to find enough food because of a decline in the Chinook salmon population.

Source: CBC News January 12, 2019 00:45 UTC