SC2Mapster

This unit is the Spine Harpy, an evolved unit from a Spine Crawler. It's now an air unit but maintains its ability to attack only ground units. However, thanks to his new ability to levitate, he can now move much faster across the terrain regardless of geography and without the need for creep.

Animation's Reference:

50-249 Stand
350-400 Attack
441-501 Idle00
601-650 Start Walking
725-794 Walking