The National Geographic Photo Ark offers readers a stunning collection of animal portrait photography featuring thousands of species from around the world. The Photo Ark is a project founded in 2005 by veteran National Geographic photographer Joel Sartore. It aims to "document every species living in zoos and wildlife sanctuaries," many of which are threatened or endangered in the wild, with the ultimate goal of inspiring people to help protect these species and their habitats. Visitors can explore this ongoing project's more than 30,000 photographs of more than 9,000 species (as of this write-up), with each species including multiple beautiful photos with simple black or white backgrounds, its common and scientific name, its population status on the International Union for Conservation of Nature's (IUCN) Red List, and other information. Readers can search this vast trove of photos by species name and filter by class (e.g. birds, reptiles, cephalopods, etc.), IUCN Red List status, and where the photo was taken. Teachers may want to check out the Photo Ark's education section, where they will find several classroom activities and other teaching resources.