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Research in 2007 shows that chimpanzees in the Fongoli savannah sharpen sticks to use as spears when hunting, considered the first evidence of systematic use of weapons in a species other than humans. [80] Other mammals that spontaneously use tools in the wild or in captivity include elephants , bears , cetaceans , sea otters and mongooses . Birds [ edit ] Several species of birds have been observed to use tools in the wild, including warblers, parrots, Egyptian vultures, brown-headed...