Say hello to my friend informally, his name is Gurt.

A symbol, but started between the teeth. On the rude bird, it's a protective sheath.

what is seen twice in a week ,once in a year and never in month?

The Machine Test: Prove you are breathing by staring at a screen. I hunt for the robots, though I am a machine. What am I?

Folded wisdom in your glove box, guiding hands as they roam, paths drawn in ink, a paper oracle of roads.