Arriving in October, the Monarch Butterflies cluster together on the pines and eucalyptus trees of the Sanctuary. Their migration to Pacific Grove is so unique that Pacific Grove is nicknamed "Butterfly Town, U.S.A." The community has always welcomed the butterflies and advocated for the butterflies' protection. Citizens of Pacific Grove voted to create an additional tax to create the Monarch Grove Sanctuary which is cared for by dedicated volunteers. The Pacific Grove Police Department enforces strict regulations that prohibit the "molestation of butterflies." The fine? $1,000.