Barrie Britton / Verreaux's Sifaka (Propithecus verreauxi) leaping between trees in Spiny Forest, with Madagascar ocotillo (Alluadudia procera) Ifotaka, Madagascar. Photograph taken on location for BBC 'Wild Madagasc...

Barrie Britton / Verreaux's Sifaka (Propithecus verreauxi) leaping between trees in Spiny Forest, with Madagascar ocotillo (Alluadudia procera) Ifotaka, Madagascar. Photograph taken on location for BBC 'Wild Madagasc...

Todd Pusser / Eastern spinner dolphin {Stenella longirostris orientalis} W Mexico, Pacific

Todd Pusser / Eastern spinner dolphin {Stenella longirostris orientalis} W Mexico, Pacific

Todd Pusser / Eastern spinner dolphin {Stenella longirostris orientalis} off Mexico, Pacific