Monarch, Western Monarch Butterfly, Western Monarch Butterflies, Monarch butterfly, Monarch butterflies, Danaus plexippus, butterfly, butterflies, insect, insects, wildlife, mass, group, many, cluster, clusters, clump, winter, wintering, migration, migrate, Eucalyptus tree, Eucalyptus trees, camouflage, vertical, leesonphoto, Pismo Beach Monarch Butterfly Grove, North America, California