Answer:
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
Voiceless it cries, Wingless flutters, Toothless bites, Mouthless mutters. What is it?
Two horses, swiftest traveling, harnessed in a pair, and grazing ever in places. Distant from them.
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
I scribble forms of the finest letter, And repel elements of the harshest weather. I am an arrow-aimer and a dust-breaker.
This food is a tortilla filled with cheese and sometimes chicken before being heated or cooked.