 The only land animals known to exist are two species of reptiles ("Gehyra insulensis", a gecko, and "Emoia cyanura," a skink), bright-orange land crabs ("Johngarthia planata", sometimes known as the 'Clipperton Crab', although it is also found on other islands in the eastern Pacific), birds, and rats.The rats probably arrived on large fishing boats that were wrecked on the island in 1999 and 2000.Bird species include white terns, masked boobies, sooty terns, brown boobies, brown noddies, black noddies, great frigatebirds, coots, martins (swallows), cuckoos and yellow warblers.