Igor Shpilenok / Northern Red-backed Vole (Cletrionomus rufocanos / Myodes rutilus) looking from hole in tree. Kronotsky Zapovednik Nature Reserve, Kamchatka Peninsula, Russian Far East, September.

Michael Quinton / Northern Red-backed Vole (Clethrionomys rutilus) in strawberry plants, Alaska

Michael Quinton / Northern Red-backed Vole (Clethrionomys rutilus) eating blueberry, Alaska

Michael Quinton / Northern Red-backed Vole (Clethrionomys rutilus) eating blueberry, Alaska

Michael Quinton / Northern Red-backed Vole (Clethrionomys rutilus) eating blueberry, Alaska

Michael Quinton / Northern Red-backed Vole (Clethrionomys rutilus) in abandoned northern flicker tree cavity with star tracks in background, Slana, Alaska

Michael Quinton / Boreal Owl (Aegolius funereus) in tree cavity with captured Bank Vole (Clethrionomys glareolus) in winter, Alaska

Bengt Lundberg / Northern red backed vole (Clethrionmys rutilus) among lichen and bearberry fruit. Sweden, Scandinavia, Europe

Michael Quinton / Northern Hawk Owl (Surnia ulula) fledgling swallowing Northern Red-backed Vole (Clethrionomys rutilus) prey, Alaska, sequence 5 of 5

Michael Quinton / Northern Hawk Owl (Surnia ulula) fledgling swallowing Northern Red-backed Vole (Clethrionomys rutilus) prey, Alaska, sequence 4 of 5

Michael Quinton / Northern Hawk Owl (Surnia ulula) fledgling swallowing Northern Red-backed Vole (Clethrionomys rutilus) prey, Alaska, sequence 3 of 5

Michael Quinton / Northern Hawk Owl (Surnia ulula) fledgling swallowing Northern Red-backed Vole (Clethrionomys rutilus) prey, Alaska, sequence 2 of 5