Mary McDonald / Mountain gorilla (Gorilla beringei beringei) silverback laying down, with infant playing on his back, Kwitonda group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) infants with their heads close together, Kwitonda Group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) silverback sitting among Lobelia, Kuriyama Group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) female hugging infant, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) silverback lying down with infants playing on his back, Kwitonda group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) infant beating chest, Hirwa group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) silverbck eating bamboo, Hirwa group, Volcanoes National Park, Rwanda. Endangered.

Mary McDonald / Mountain gorilla (Gorilla beringei beringei) infant playing on lobelia plant, Kuryama group, Volcanoes National Park, Rwanda. Endangered.

Jack Dykinga / Bladderpods (Peritoma arborea) flowering across the desert floor following an above average winter rain season, with Creosote bushes (Larrea tridentata) and flowering Fiddlenecks (Amsinckia sp.) at su...

Jack Dykinga / Scorpionweed (Phacelia sp.) flowering on desert floor amongst Teddy bear cholla (Opuntia bigelovii) and Saguaro cacti (Carnegiea gigantea) at sunset, Sonoran Desert National Monument, Arizona, USA. Ma...

Jack Dykinga / Bladderpods (Peritoma arborea) flowering across the desert floor following an above average winter rain season with Saguaro cacti (Carnegiea gigantea) and mountains in crimson light at sunset, Barry M...

Jack Dykinga / Mexican gold poppies (Eschscholzia californica mexicana) flowering in the desert with Cholla (Cylindropuntia sp.) and Saguaro cacti (Carnegiea gigantea), Ironwood Forest National Monument, Sonoran Des...