#popular #nature #south asia #male butterfly #troides helena #common birdwing #helena species #papilionidae family #troides genus #semi close-wing view #velvety black forewings #hind wings rich golden yellow edged with black #single #black antennae #black head #yellow abdomen #invertebrate #insect #outdoor #nature #nikon d7200 #tamron #knpandit #rishikhola #sikkim