Colorado's controversial plan to reintroduce gray wolves has seen the arrival of the first litters of pups.
Colorado Parks and Wildlife (CPW) have released trail camera footage showing three tiny wolf pups tumbling through the grass in Routt County.
While staff have spotted young wolves at some dens, CPW says the total number of pups across all packs is still being confirmed.
'Successful pack formation is vital to our wolf restoration plan - not just for bolstering Colorado's wolf population, but also for developing pack territories,' a CPW spokesperson said.
The department defines a wolf pack as one in which a breeding pair has produced pups.
