A pass of the flashlight revealed this new species of bent-toed gecko by its orange eyeshine.
Many of these geckos were seen in the trees, but a few were also grabbed on the ground for study.
"Interestingly the local guides, who were forest people and afraid of very little, refused to touch the geckos and would not catch them," added the University of Adelaide's Oliver. "I could not work out why they feared them."
As for the gecko, it was likely a bit perplexed by the appearance of an artificial light.
"People have lived in New Guinea for probably 50,000 years, and they live almost everywhere across the island," the natural history museum's Helgen said. "But these mountains are unique. There are no roads, no tracks, no people—and almost no human impact."
(Download "Lost World" animal wallpapers.)