Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Theo Allofs / Copernicia (Copernicia alba) palm tree at brakish lake, southern Pantanal, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, a second monkey eats the opened palm nuts, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) preparing to lift a rock hammer that is extremely heavy compared to the monkey's body weight to crack open palm nuts it has placed in small pits in the anvil rock surface...

Pete Oxford / Brown Capuchin (Cebus apella) preparing to lift a rock hammer that is extremely heavy compared to the monkey's body weight to crack open a palm nut it has placed in a small pit in the anvil rock surfa...

Pete Oxford / Brown Capuchin (Cebus apella) preparing to lift a rock hammer that is extremely heavy compared to the monkey's body weight to crack open palm nuts it has placed in small pits in the anvil rock surface...

Pete Oxford / Brown Capuchin (Cebus apella) using rock to crack open palm nuts, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) pair sitting on anvil used to crack open Piassava Palm (Attalea funifera) nut, monkey on left knocking nuts together to test for freshness, Cerrado habitat, Piaui State,...

Pete Oxford / Brown Capuchin (Cebus apella) in tree with finger inside cracked open Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) licking fingers after drinking from Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) sitting on anvil used to crack open Piassava Palm (Attalea funifera) nuts, sniffing nut for freshness, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) standing on anvil used to crack nuts, spitting out pieces of Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) using rock hammer that is extremely heavy compared to the monkey's body weight to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Br...

Pete Oxford / Brown Capuchin (Cebus apella) placing a palm nut in a small pit in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) stabilizes itself with its prehensile tail while using a heavy rock hammer to crack open palm nuts placed in small pits in the anvil rock surface, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) holding a rock hammer which is uses to crack the palm nuts placed in small pits in the anvil rock at its feet, Cerrado habitat, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) holding a palm nut that it will place in a small pit in the anvil rock surface and crack open using the rock hammer that is extremely heavy compared to the monkey's body...

Pete Oxford / Brown Capuchin (Cebus apella) picking up Piassava Palm (Attalea funifera) nut, to crack open with rock, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) licking fingers after drinking from Piassava Palm (Attalea funifera) nut, Cerrado habitat, Piaui State, Brazil

Pete Oxford / Brown Capuchin (Cebus apella) with rock hammer that is extremely heavy compared to the monkey's body weight which it uses to crack open palm nuts placed in small pits in the anvil rock surface, Cerrad...