From Koya Folklore
In Hardiput was a Koya called Guruwari. A Gour lived in the same village. Once, when he was grazing cattle, he came to a stream, and found a lotus growing in the water. In this lotus was a girl. She came out and began to cry. The Gour saw her and took her home, and the girl grew up in his house.
There was a Koya called Sonia who fell in love with this girl. One night he went to the house, dug a hole in the wall and pushed his penis through. It reached the girl and entered her. The girl awoke and hit it with her sword and cut it off. It grew two wings and flew out of the house. The girl tried to catch it, but it flew up to Deur (the Koya sky god) and he hid it and said to the girl, “Wait a little: it will come out presently and then you can kill it.” After a time Deur let it fly out and the girl threw her sword at it. The flash of the blade is the lightning.
Source:
Chapter 5, Tribal Myths of Orissa, Verrier Elwin, 1954
Kotharian Lightning 