As monarch butterflies take their annual migratory trip to the west coast in winter, citizen scientists help researchers keep track with the Western Monarch Thanksgiving Count. Find more migration projects on SciStarter!
by Eva Lewandowski
Every autumn, the western North American population of monarch butterflies migrates from the lands west of the Rocky Mountains to the coast of California, where they spend the winter at about 200 sites scattered throughout the coastline. Last winter,