The process of growing to adulthood is one fraught with danger for plain tiger butterflies; when the eggs are laid, they quickly become favorite targets for ants, and then while the creatures are still caterpillars they're under constant threat from wasps. Once they create their chrysalises they become a favorite snack for sparrows and end up dying inside their chrysalises.
樺斑蝶成長的過程充滿了重重危機，在雌蝶產卵後，就引來螞蟻的覬覦，幼蟲期間受到土蜂的威脅，成蛹後又招來麻雀的好奇啄食，雖然沒有成為麻雀的食物，卻因此胎死蛹中。