Mini Beast Riddle

My mini beast has skin as grey as a cloud and eats a lot of wood.

 It’s as cunning as a fox and as quiet as a mouse because it is so small. Also, it is as fast as a car and a zooming rocket. Zoom!

 But sometimes it loves to crawl and cannot fly like a bird.

Mostly you might see me under logs and crawling on the moist compost.

 I have 3 legs on each side and total is 6 and the as black as ink.

I am a …….

By  Abdul