I found this in our garden at Mangalore, Coastal Area of Karnataka State, South India.

What could be the reason for this Aberration?
I find plenty of normal ones in our garden during December to May every year.
But this is the only aberrant one I found.

(No natural or man made mishap has happened in the area in the recent past)

20180207-IMG_2530 by GKBaliga, on Flickr