The juice the larvae consume in these plants contains poisonous glycosides that will make the butterfly distasteful later on to birds.
The difference between Danaus Eresimus Tethys (Soldier) and Danaus Gilippus Bernice (Queen)
The spot on the lower hind wing is a little pouch called “androconial pouches” made of the modified scales that contains pheromones or male scent used during courtship. The male will give off a dusting of pheromone onto the female when the male hovers over her in courtship.
