Mark Raycroft / German Shepherd (Canis familiaris) puppies, North America

Mark Raycroft / Golden Retriever (Canis familiaris) puppy, North America

Tim Fitzharris / Gray Wolf (Canis lupus) pups in light snowfall, North America

Tim Fitzharris / Raccoon (Procyon Lotor) two babies climbing tree, North America

Tim Fitzharris / Raccoon (Procyon Lotor) two babies climbing tree, North America

Tim Fitzharris / Mountain Lion (Puma concolor) mother carrying cub in her mouth, North America

Tim Fitzharris / Red Fox (Vulpes vulpes) kit, North America

Tim Fitzharris / Red Fox (Vulpes vulpes) trio of kits peeking out of their den, North America

Tim Fitzharris / Striped Skunk (Mephitis mephitis) kit, North America

Konrad Wothe / Raccoon (Procyon lotor) young peering out from hole in tree, North America

Sumio Harada / Red Squirrel (Tamiasciurus hudsonicus) curious 40 day old babies peer out from nest in tree trunk, Rocky Mountains, North America

Konrad Wothe / Fisher (Martes pennanti) baby calling from tree cavity, North America