U.S. Sen. Ron Johnson, R-Wis., on Friday said he introduced an amendment that would remove wolves from federal Endangered Species Act protections in four states.

Johnson added the provision to de-list wolves in Minnesota, Wisconsin, Michigan and Wyoming to the upcoming Energy Policy Modernization Act that has not yet seen Senate action.

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Wolves had been off the endangered list in those states for three years but went back on in December 2014 under orders of a federal judge.

It's the second effort this month to legislate the wolves back off the list. A virtually identical provision is included in the so-called Bipartisan Sportsmen's Act of 2016. The bill, S-659, cleared a committee but still must clear the full Senate. The House has passed a similar bill. Any final, compromise bill would have to be signed by the president before the changes in wolf status would occur.

Johnson's amendment also includes a provision prohibiting the Interior Department from declaring the northern long-eared bat an endangered species. The bat recently received lesser threatened status.