Monarch Butterfly Migration California 2024 Map. Unlike other caterpillars that make a chrysalis, transform into butterflies and then die within weeks, monarchs are part of a yearly “super generation.”. Monarch spring migration has begun.
Unlike most other insects in temperate climates, monarch butterflies cannot survive a long cold winter. Unlike other caterpillars that make a chrysalis, transform into butterflies and then die within weeks, monarchs are part of a yearly “super generation.”.