After a pack of wolves almost drove the deer on a small Alaskan island extinct, they switched to eating sea otters and other marine creatures
and fish, but not as their main food source. Two wolves were first sighted on Pleasant Island in 2013, having swum over from the mainland. Levi’s team has been studying them and their offspring since 2015.
But the deer population quickly fell. By 2017, there were 13 wolves on the island and the deer were at only 7 per cent of their 2015 population, a level that has held until 2020, the end of the period studied.Alaska Department of Fish and Game.
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