Raviners are a common pest species with many names(
) including Goggltins, Stalksnoops, Peergrips, and Hill-crabs.
The name Raviners is a used near The Mansion of E as the critters are found in a nearby ravine(). They also show up in the Basement (including() Subshaft 44-F) and Rufus complains about them getting into machines().
Raveners are edible if cooked properly() but aren't a great food.