They didn’t “reintroduce” wolves. There are several different species of wolves. The species they inserted into Montana were Canadian Gray wolves which are larger than the species that was there.
BTW - what they did was illegal. But the Feds in concert with environmentalist wackos got away with it.
https://www.huntingfishing.com/index.php/canadian-wolves-got-yellowstone/
“They didn’t “reintroduce” wolves”
YES they did. The wolf was hunted to extinction. It was a good thing