Oregon's growing wolf population showed no signs of slowing down in 2015.

The number of Canis lupus increased by 36 percent in Oregon last year to an estimated 110 animals, according to the Oregon Department of Fish and Wildlife’s annual wolf report.

Despite a politically raucous year that saw wolves removed from the state endangered species list — and a lawsuit filed by environmentalists to challenge that decision — the report shows wolves expanding in numbers and territory.

ODFW documented 11 breeding pairs of wolves in 2015, up from nine in 2014. The agency also counted 33 pups born in 2015 that survived through though Dec. 31.

The numbers are more of an estimate than an hard number, ODFW officials stressed, noting that the real number is likely higher than 110.

“As predicted, Oregon’s wolf population has continued to expand its range and grow in number,” said Russ Morgan, ODFW wolf coordinator. “While northeast Oregon continues to have the highest number of wolves, there is also continued movement of wolves into southern Oregon.”

Morgan said the population growth was driven by three main factors: healthy reproduction, survival through the winter and expansion into new territory.

There are now 10 wolves and four areas of known wolf activity in Western Oregon — classified as west of Highway 395 — clustered to the north and west of Klamath Falls. The trailblazing wolf OR7 and his Rogue Pack account for six of those wolves south of Crater Lake National Park.