Wolves had never colonized Pleasant Island until about a decade ago. After they ate all the deer, scientists assumed they'd die out. But the pack kept growing.
in a journal of the National Academy of Sciences on the island’s wolves. This new pack killed all the black-tailed deer on the island — a favorite meal for Southeast wolves. They’re a territorial species, and an established pack was back on the mainland preventing a return. Roffler and other scientists assumed they would die off from starvation.
“The ‘Uh-Oh’ was, you can see what’s coming,” he said. “Having the pack discover the place. And [then] there was two wolves instead of one. You could kind of read the tea leaves.” Roffler’s team collected scat and studied it in a lab to see what the wolves were eating. And it showed something surprising: sea otter.
“Something that we assume about wolves is that they really can’t live without ungulate prey,” she said. “They very quickly switched to a diet that primarily consists of sea otters. It really just took a couple of years for that to happen.” Roffler hasn’t witnessed the pack hunt and is hesitant to speculate about it. But Streveler has a theory.
“Before, nobody here ever saw an otter haul out. Ever,” Streveler said. “And so, to find a naive group of very easy to catch, very, very delicious critters. Oh, my God, you know, it’s like discovering the Garden of Eden.”
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