On Wednesday, anti-hunting groups tried to stop wolf hunting and trapping in Montana, only to be rejected by the federal appeals court.
Wolves were delisted last spring and the 9th U.S. Circuit Court of Appeals claimed that Congress had every right to intervene, according to foxnews.com. The animal activists, however, felt that Congress interfering violated the Constitution's separation of powers.
The amendment marked the first time Congress has forcibly removed a species' endangered status. It was tacked onto a federal budget bill by Idaho Republican Rep. Mike Simpson and Montana Democratic Sen. Jon Tester.
"This case has made it clear that those who persist in trying to manage wildlife through the courts, in spite of all scientific evidence that this species has recovered, no longer have a defensible position," Simpson said Wednesday.