Swift buck

From MUME

Swift bucks are passive level ~3 mobiles, common in the area near Blue Mountains. Their corpses can be butchered for a fine pelt and some meat.

A buck runs swiftly from place to place, looking about warily as it grazes.
>examine buck
This deer moves about with lightning speed, darting to and fro. It is
brown and has small antlers that it uses during the mating season.