Twoleg

Twoleg is the Clan term for a human. Twolegs vary greatly in appearance but are mostly bipedal with long extremities, thin, short hair covering most of their bodies, hair of varying length on top of the head that can grow to extreme length, two eyes facing forward, a mouth filled with mostly blunt teeth, and fingers on their upper extremities that can be used to pick up items. Twolegs vary in skin color from stark white to near-black, and natural hair colors vary in the same way.
==General==
Twolegs are tall, smooth-skinned creatures with removable pelts (presumably coats/jackets) to keep them warm, and thick fur on their heads and occasionally on their faces. They generally stay in areas called Twolegplaces and look after kittypets, dogs, and other animals. They occasionally ride in the bellies of monsters, or on the backs of horses. They live in large, boxy nests with hard roofs and floors surrounded by neat gardens and fences. They also seem to like dogs.
Twolegs are also known by cats as housefolk, workfolk, Upwalkers, Nofurs, or Twopaws. The Clan cats find their gestures, motives, and habits very strange, and they don’t understand why Twolegs do such things.
===Language===
Twoleg language seems to come across to Clan cats as angry gibberish, although kittypets seem to understand Twoleg speech to an extent. Additionally, kittypets apparently know the Twoleg words for certain Twoleg-related things and concepts, for instance the names of rooms in a house.
===Structures and monsters===
Throughout the series, Twolegs have brought all sorts of strange things into the world of the Clans. Cats regularly see Twolegs sitting in various types of monsters (vehicles such as cars and trucks), and even ones that float on water, which they refer to as water-monsters (motorboats). The Clan cats are rightfully scared of the monsters for reasons other than the noise. Twoleg monsters have tried hitting cats in the past. They occasionally succeed.
They also see Twoleg houses, which are known to them as dens or nests, and feel uncomfortable inside them because of the enclosed space inside the roof and walls.