"developed tools" . "effective tools" . "species known to use tools" . "tools to dig for insects" . "termite fishing" . "tool-use" . "ability to make tools" . "had been reported in captivity" . "tool" . "twigs as bait" . "technologically advanced non-human" . "tool use" . "simple tools" . . "tool use by animals" . . "tool-using species" . . "use of stones as tools" . "Tool use by animals" . "use a variety of sophisticated tools" . "using tools" . "tool-making ability" . "use tools" . "use of tools" . "nut cracking" . "tool usage" . "similar to that of primates" . "Tool use behavior" . "tool skill" . "Many species make and use tools" . "use objects as tools" . "a number of species can use tools" . "animals that use tools" . . "Tool use behaviour" . "tool technology" . "use of tools is rare in birds" . "non-human primate tools" . "tools" . "animals using twigs and rocks as tools to get food" . "tools in the wild" . "using spears" . "Tool use by animals" . "use stone tools" . "create/use the most tools" . "not unique to humans" . "similar to that used by primates" . "Tool use" .