A wingcow is a type of bovine found in Xanth, commonly herded for its milk.
Wingcows are a breed of bovine that can fly. After being relieved of their milk, wingcows will often fly up to graze on treetops. As they eat, they slowly build up more milk. This weights them down and they float back down to the ground until milked again. Their milk is often used to make wingcow cheese.
- A Spell for Chameleon, Chapter 2