This image released by PBS shows National Geographic Joel Sartore covered with Monarch butterflies in the Sierra Chincua monarch sanctuary in Mexico. Sartore is documenting thousands of rare animal species. His quest is detailed in the PBS series "Rare: Creatures of the Photo Ark," a three-part series debuting Tuesday at 9 p.m. EDT. (Joel Sartore/PBS via AP)
Featured Photo Galleries
