<human>:  What are the migration patterns of monarch butterflies?
<bot>: The migration patterns of monarch butterflies involve a multi-generational journey that begins in the spring in Mexico (or Southern California) and can cover up to 3,000 miles as the butterflies travel north through the United States and Canada, lay eggs for a new generation, and then continue their journey back to Mexico for the winter. Along the way, the butterflies rely on certain plants for nourishment, rest for the night, and for breeding.