Chimps were observed thrusting their spears into hollow trunks and branches with enough force to injure anything inside the holes, Pruetz’s research team says. The chimps used a “power grip” and made multiple downward stabs – much the same way as a human might wield a dagger.Link (Thanks, Matt!)
Ten different chimps in the population were observed to perform this behaviour in 22 bouts. In one case the researchers saw a chimp remove a dead bushbaby and eat it.
Previously on Boing Boing:
• Club-wielding chimpanzee spotted in LA suburb
• Jane Goodall on human-like behavior in chimps
• Chimps attack humans at ape sanctuary
• Video: Chimp plays Ms. Pac Man
• Oliver the Humanzee