Washington DC - The US House on Tuesday passed a bill that would remove endangered species protections for the gray wolf across much of the country, sparking outrage among conservationists.

Sponsored by far-right Representative Lauren Boebert, the bill passed narrowly along party lines in the Republican-majority House and now heads to the Senate.

The White House on Monday announced its strong opposition to the measure, indicating a likely veto from President Joe Biden if it reaches his desk.

In October 2020, former president Donald Trump removed gray wolves from their protected species status, which was put in place in the 1970s after their near extinction in the continental US.

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These protections were restored by a federal judge in February 2022, but not before the lapse in safeguards led to devastating losses: more than 200 were killed in a 72-hour hunting spree in Wisconsin, in just one example.

A quarter of a million wolves once roamed from coast to coast before European colonizers embarked on campaigns of eradication that persisted into the 20th century and all but wiped them out, outside their Alaskan stronghold.

Today they number around 5,000 in the continental US thanks to their listing on the Endangered Species Act (ESA). But activists say recovery remains tenuous.

"If our elected leaders truly want to see this species fully recovered and properly delisted from the Endangered Species Act, they will vote no on this bill and allow wolves to continue their comeback story guided by best available science," said Robert Dewey of Defenders of Wildlife, one of more than 100 organizations that condemned the bill.

Republicans have systematically targeted environmental protections in the ESA, leading conservationists to warn that entire species are being put at risk of extinction.