Rabbit and sparrow bones were found at the bottom of a cliff, with sparrow feathers in hawk droppings, indicating that hawks prey on sparrows and rabbits. Worms, caterpillars, and snails were found amongst leaves under trees, with smashed snail shells on rocks and chewed leaves on the ground, showing that snails, caterpillars, and other insects are eaten by birds and small mammals. Eagles nest at the top of the cliff, placing them at the top of the food chain as apex predators at Grassy Hills.