Yara-ma-yha-who
Region of origin: Australia
A small red imp of a figure with a head disproportionately larger than its body, the Yara-ma-yha-who makes it home in fig trees. If anyone stops to rest under its tree, it will descend and latch on to them with its leech-like fingers and toes, draining blood until its victim passes out, at which point it swallows them whole and, sated, falls asleep. Upon awakening, it will regurgitate the person, who find themselves worn down, slightly smaller and redder than before but with no memory of the encounter. The Yara-ma-yha-who will repeat this process over and over until eventually the victim themselves has become a new Yara-ma-yha-who. Tales of the Yara-ma-yha-who are used to discourage children from entering potentially dangerous areas.
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The Compendium of Arcane Beasts and Critters 