Lei Gong

In the Chinese mythology, the Lei Gong (or Lei Kung) is the god of thunder. He has the beak, wings and claws of an owl but a human body and is blue. He wears a loincloth and is shown carrying his emblems of hammer and drum with these he can produce thunder. In the bureaucratic way of the Confucian deities, Lei Gong is the official ministry of Thunder, helping to keep celestial administration going. Lei Gong pursues all who are guilty of undetected crimes.

John and Caitlin Matthews, The Element Encyclopaedia of Magical Creatures, 2013, Lei Gong, p 292