A leaf-tailed gecko, Saltuarius eximius, discovered on rocky terrain in isolated rain forests of the Melville Range of northeastern Australia. It's not easy to spot this gecko, which has an extremely wide used for its camouflage. With longer limbs, a more slender body and larger eyes than other Saltuarius species, this one has a mottled coloration that allows it to blend in with its surroundings. Native to rainforests and rocky habitats, this gecko is a bit of a night owl. It is found on the vertical surfaces of rocks and trees as it waits for prey. Surveys have not found additional populations, suggesting this may be a rare species. Photograph: Conrad Hoskin/PA