On the morning of February 16, 1832, the rocks were visited by Charles Darwin on the first leg of his voyage on HMS Beagle around the world. Darwin listed all the fauna he could find; noting that not a single plant or even a lichen could be found on the island. Darwin found two birds, a booby and a noddy, a large crab that stole the fish intended for baby birds, a fly that lived on the booby and a parasitic tick. He found a moth that lived on feathers, a beetle, a woodlouse that lived on dung, and numerous spiders that he thought lived on scavengers of the waterfowl. Darwin felt that these rocks represented how life first took hold on a newly formed outcrop.