ocr: TOOL USE XAMPLES OF TOOL USE are rare EX - in the animal world. Very few bird species use tools to get their food. The woodpecker finch from the Galapagos Islands uses cactus spines to prise insects out of trees. The TWIG TOOL Egyptian vulture cracks ostrich eggs with stones, and the green heron drops twigs onto the water, to act as bait GRIPPING while fishing. TOES WOODPECKER FINCH Holding a CaCtHS spine firmly in its beak, this finch probes for A meal.