Fader Bull

Fader Bull were bull-like Rahi that could teleport away from danger (though they have been known to teleport into solid objects on occasion). Rahaga Pouks said that to capture them, scare a herd of them and look for where the first one teleported, you might get there in time to catch the third or fourth, assuming that they don't crush you. They are so named because their teleportation leaves behind a ghostly image of themselves that slowly fades away.

Reign of Shadows
After the battle of bara magna they migrated to Spherus Magna.