Answer:
What has a big mouth, yet never speaks?
What kinds of men are always above board?
This thing all things devours: Birds, beasts, trees, flowers; Gnaws iron, bites steel; Grinds hard stones to meal; Slays king, ruins town, And beats high mountains down.
Sleeping during the day, I hide away. Watchful through the night, I open at dawn's light. But only for the briefest time, do I shine. And then I hide away. And sleep through the day.
You can read it both ways, I wearΝΎ One way it's a number, reversed a snare.
I have two eyes in the front and a lot of eyes on my tail