Why is spring migration a race against time?

Millions of monarchs are about to take to the sky and begin their journey north. The butterflies are leaving Mexico in response to the changing seasons. Why are monarchs in a race against time as they begin their spring migration?

  • Name two reasons monarchs need to leave Mexico quickly in the spring. Name two reasons the butterflies should not come north too quickly.
Journey North Home Page   Facebook Pinterest Twitter   Annenberg Media Home Page
Copyright 1997-2017 Journey North. All Rights Reserved.   Contact Us    Search