Peter Blackwell / Seven Little Bee-eaters (Merops pusillus) in a row, one facing away, Masai Mara, Kenya.

TOM MANGELSEN / Moose by lake, Alaska (Alces alces) Denali NP US

Andrew Cooper / Glow Worm beetle female glowing at sunset to attract mate, Devon England (Lampyris noctiluca)

Jim Brandenburg / Gemsbok (Oryx gazella) on sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) running across sand dune, Namib Desert, Namibia

Jim Brandenburg / Gemsbok (Oryx gazella) standing on dune, Namib Desert, Namibia

Tom Vezo / Purple Martin (Progne subis) and Tree Swallow (Tachycineta bicolor) mixed group perching on branch, Crane Creek, Ohio

Jim Brandenburg / Arctic Wolf (Canis lupus) male on iceberg, Ellesmere Island, Nunavut, Canada

Jim Brandenburg / Arctic Wolf (Canis lupus) male sitting on iceberg, Ellesmere Island, Nunavut, Canada

Flip Nicklin / Sperm Whale (Physeter macrocephalus) mother and albino baby swimming, Portugal

Tui De Roy / Emperor Penguin (Aptenodytes forsteri) large chick on fast ice, midnight sun in austral spring, No-name Rookery, Princess Martha Coast, Weddell Sea, Antarctica

Tui De Roy / Emperor Penguin (Aptenodytes forsteri) large rookery on sea ice, Atka Bay, Princess Martha Coast, Weddell Sea, Antarctica