Wildlife researchers said today, they have discovered 123 new species on Borneo island, including a lungless frog, the world’s longest insect and a slug that fires “love darts” at its mate.

In 1947, a World War II British pilot was heading towards Tawau when he flew over what he thought was a mist-shrouded jungle. But as the cloud dissipated, he found himself encircled by a wall of steep cliffs rising 915m above the jungle floor.