BOB GIBBONS / SCIENCE PHOTO LIBRARY BOB GIBBONS / SCIENCE PHOTO LIBRARY
Monarch butterflies (Danaus plexippus) overwintering in a tree. This butterfly is native to the Americas, Australia and New Zealand, and is found in other locations as well. Every year millions of monarch butterflies migrate to their hibernation sites, where they cluster together for protection and energy conservation. Photographed in California, USA.
Model release not available. Property release not required.