Many hexapod robots are biologically inspired by Hexapoda locomotion. The Spider is a remote-controlled hexapod robot. A hexapod robot is a mechanical vehicle that walks on six legs. A radially symmetric hexapod is ATHLETE (All-Terrain Hex-Legged Extra-Terrestrial Explorer) robot at JPL. Biologically inspired hexapod robots largely depend on the insect species used as a model. The hexapod is attached to the telescope through a metal tetrapod. Conversely, biologists can use hexapod robots for testing different hypotheses. AMiBA was originally configured as a 7-element interferometer atop a hexapod mount. Timberjack, a subsidiary of John Deere, built a practical hexapod walking harvester. Like many other hexapod insects, "Drosophila" typically walk using a tripod gait. Timberjack, a subsidiary of John Deere, built a practical hexapod Walking Forest Machine (harvester). Alternative mechanics to the stationary (outer) swashplate are the hexapod and the universal joint. This is a list of hexapod robots.