Their recent litter marks the first known pups for 8-year-old OR-3.
"When an 8-year-old wolf has his first-known litter of pups and when his 8-year-old brother is confirmed to have had his third litter, it's a moment of awe and wonder," said Weiss. "Oregon killed off its wolf population by the 1940s but state and federal protections have allowed these magnificent animals to make a comeback, and those protections should remain in place until wolves are fully recovered."
The gray wolf lost its place on the Oregon endangered species list in 2015 after the animals reached a population milestone — four pairs had bred for the third straight year — which set in motion a process to remove their protections.
A move to block the removal failed earlier this year, but the Center for Biological Diversity and other groups have filed a legal challenge to the delisting.
Wildlife officials have said that the state can support up to 1,400 gray wolves, but Oregon's population currently stands at around 150 who only inhabit roughly 12 percent of land suitable for the species.