The squonk is a real-life "monster" that apparently is so ugly that it spends most of its time hiding and crying. If you catch one, it can turn into a puddle of tears and bubbles and evade capture. It apparently exists in the forests of Pennsylvania, although it's hard to imagine a creature with such existential angst would make it very far in the world.
Regardless, I think that squonks will feature in the next thing I write. There's something about these warthog-like doofus things that's got a lot of pathos.