Chakora

A Chakora (pronounced: "CHUH-kor-uh") is a mythical bird that is said to live off moonbeams.

Aru Shah and the End of Time
Near in the end of the novel, Hanuman takes Aru Shah and Mini through a gate of chakora feather to get to their next lesson. According to Hanuman, a feather plucked from a moon bird will glow brightly, but only for a moment. If one were to wait until the feather is shed naturally, it will forever bring them light.