The Hurkle Is a Happy Beast
Hurkles are affectionate but dangerous to humans... why?
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Hurkles have the valuable power, on Lirht, to "become invisible if frightened." These aspects of the hurkle are crucial to its behavior on earth; it is an animal that could itch humans to madness with its affection while remaining completely friendly, with no malice at all.
The Hurkle Is a Happy Beast