What does a monarch butterfly do to survive when the temperature begins to drop and their food supply is scarce?

When temperatures drop and food becomes scarce, Monarch Butterflies migrate to warmer climates, often traveling thousands of miles to reach their winter roosting sites in Mexico or California. During this journey, they rely on stored fat reserves for energy, as they may not find sufficient food sources along the way. In the winter, they enter a state of diapause, significantly reducing their metabolic rate to conserve energy until temperatures rise and food becomes available again in the spring.