HELENA, Mont. (AP) — Environmental groups have told a judge that the wolf population in Montana and in Yellowstone National Park would be irreparably harmed if he lifts a temporary restraining order that restricted wolf hunting and trapping.

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Monday's hearing before District Judge Chris Abbott in Helena comes as Montana and other Republican-led states have moved in recent years to make it easier to kill the predators.

Montana’s loosened wolf-hunting rules drew sharp criticism after 23 wolves from Yellowstone National Park were killed last winter, including 19 by hunters and trappers in Montana.

Environmentalists in October sued the state over its regulations.

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