The World Book Encyclopedia notes that most butterflies do not live longer than a few weeks, but that some species may live up to 18 months. Some are dormant during the cold winter months or during a prolonged dry season in the tropics.
शीतोष्ण कटिबन्ध के सर्दी के ठंडे महीनों में या उष्णकटिबन्ध में दीर्घकालीन गर्मियों के दौरान कुछ जातियाँ निष्क्रिय रहती हैं ।