|"As unpredictable—and probably just as controversial—as UFOs, Leyak are a supernatural phenomenon most feared by many Indonesians."|
A depiction of Mastodonsaurus, an extinct creature resembling the supposed creature.
The Crocodile Frog is a rarely-sighted phenomenon from Borneo, described as a crocodile-frog hybrid.
Known from both native legends and sightings in 1976 and 1985, the Crocodile Frog was described as 7-9 feet long, with slimy skin, a pointed head, over-developed hind legs, and a short tail. This description doesn't exactly match known modern animal, although an injured or malformed crocodile could fit the description. Others suggest the Crocodile Frog is a surviving example of extinct giant amphibian varieties, like the one shown here.