Daniel Heuclin / Valley pocket Gopher (Thomomys bottae) Catalina mountains foothills, Arizona, USA, May

Michael Quinton / Great Gray Owl (Strix nebulosa) pair silhouetted in tree with captured Northern Pocket Gopher (Thomomys talpoides), Idaho

Michael Quinton / Great Gray Owl (Strix nebulosa) male perching in tree with captured Northern Pocket Gopher (Thomomys talpoides) male, Idaho

Michael Quinton / Great Gray Owl (Strix nebulosa) on forest floor with captured Northern Pocket Gopher (Thomomys talpoides) at its feet, Idaho

Michael Quinton / Great Gray Owl (Strix nebulosa) adult male pouncing on a Northern Pocket Gopher (Thomomys talpoides), Idaho

David Hall / Many-eyed snake eel (Ophichthus polyophthalmus), head peering out of burrow. Pantar, Alor Archipelago, Indonesia; November, 2006.

David Fleetham / Freckled snake eel (Callechelys lutea) head poking out of sand with rest of body buried. Hawaii.

Doug Perrine / Freckled snake eel / Yellow-spotted snake eel (Callechelys lutea) emerging from sandy seabed, Kona Coast, Hawaii, Pacific Ocean.

Doug Perrine / Freckled snake eel / Yellow-spotted snake eel (Callechelys lutea) emerging from sandy seabed, Kona Coast, Hawaii, Pacific Ocean.