Chimpanzees in Senegal have been observed making and using wooden spears to hunt other primates.

Chimpanzees were observed jabbing the spears into hollow trunks or branches, over and over again. After the chimp removed the tool, it would frequently smell or lick it.

In the vast majority of cases, the chimps used the tools in the manner of a spear, not as probes. The researchers say they were using enough force to injure an animal that may have been hiding inside.

[Read](http://news.bbc.co.uk/1/hi/sci/tech/6387611.stm “Read the Story”)(BBC)