in 2019 four canadian gray wolves were air lifted

In 2019, four Canadian gray wolves were air lifted into Michigan to help keep the local moose population in check as well as help revive the local wolf population.
– WTF Fun Facts

Source: https://www.iflscience.com/plants-and-animals/canadian-wolves-are-being-airdropped-into-michigan-for-a-special-mission/