What is this phenomenon in Common Mormons?

Male individuals of Common mormon ( Papilio polytes romulus) butterflies mud puddling on sandy ground. The male individuals of this species mud puddles on shady damp grounds to extract minerals. One of the individuals is excreting fluid from the abdomen. This phenomenon is to excrete excess fluid after mud puddling. This footage is part of the broadcast stock footage archive of Wilderness Films India Ltd., the largest collection of HD imagery from South Asia. The collection comprises of 150, 000+ hours of high quality broadcast imagery, mostly shot on 4K, 200 fps slow motion, Full HD, HDCAM 1080i High Definition, Alexa and XDCAM. Write to us for licensing this footage on a broadcast format, for use in your production! We are happy to be commissioned to film for you or else provide you with broadcast crewing and production solutions across South Asia. We pride ourselves in bringing the best of India and South Asia to the world... Please subscribe to our channel wildfilmsindia on Youtube    / wildfilmsindia   for a steady stream of videos from across India. Also, visit and enjoy your journey across India at www.clipahoy.com , India's first video-based social networking experience. Reach us at rupindang [at] gmail [dot] com and [email protected] To SUBSCRIBE click the below link: www.youtube.com/subscription_center?a... Like & Follow Us on: Facebook: www.facebook.com/WildernessFilmsIndiaLimited Website: www.wildfilmsindia.com #WildFilmsIndia #WildernessFilmsIndia #BroadcastStockFootage