A pod of killer whales was spotted swimming in the waters of the Vancouver harbour Tuesday afternoon. Transient whales feed on other marine animals like harbour seals, which have been steadily growing in population. (David Horemans/CBC)The draw of increased preyTransient whales, unlike southern resident killer whales, feed on marine animals like seals and sea lions. There used to be bounties for harbour seals and their population dropped down to about 10,000 in the 1970s. "We're back to historical levels of harbour seals, and these transient killer whales are discovering different hotspots where they can find those rebounded populations," Birdsall said.

Source: CBC News April 18, 2019 00:00 UTC