Can Caterpillars Survive in Deserts? Some Can—Most Can't

Caterpillars (lepidopteran larvae) generally need humidity, moderate temps, and host plants. Deserts offer extremes: heat, aridity, sparse vegetation. Most species cannot survive. However, specialist desert caterpillars exist:

• Water storage in tissues.
• Nocturnal feeding to avoid heat.
• Host plants with adaptations (succulents, deep roots).
• Rapid development during brief wet periods.

Examples: *Hyles lineata* (white-lined sphinx) larvae on desert wildflowers; *Manduca sexta* (tobacco hornworm) on desert solanaceae. But these are exceptions. Most caterpillars perish in deserts without specific adaptations and host availability.