Mari and Posa Coloring Book accompanying Welcome to Pacific Grove, Butterfly Town U.S.A., Two Monarchs Seeking A Sanctuary - Meet Mari and Posa They are monarch butterflies, sister and brother. Each year their family migrates south from Canada and Idaho to Pacific Grove, California. In October Mari and Posa arrive and begin their search around town for their new winter home at the Monarch Sanctuary by the sea. Pacific Grove historical information is included on every page. For all ages.