Gerry Ellis / Chimpanzee (Pan troglodytes) orphan Larry playing in tree, Ape Action Africa, Mefou Primate Sanctuary, Cameroon

Suzi Eszterhas / Pale-throated Three-toed Sloth (Bradypus tridactylus) male hanging in tree, Sloth Island, Guyana

Piotr Naskrecki / Painted Reed Frog (Hyperolius marmoratus) being eaten by Fishing Spider (Pisauridae), Gorongosa National Park, Mozambique

Chien Lee / Minden / Black-headed Cat Snake (Boiga nigriceps) swallowing alive Harlequin Flying Tree Frog (Rhacophorus pardalis) prey, Kubah National Park, Sarawak, Malaysia, sequence 1 of 4

Chien Lee / Sugar Glider (Petaurus breviceps) feeding on Acacia (Acacia sp) tree sap at night, Wasur National Park, Papua, Indonesia

Chien Lee / Common Flat-tail Gecko (Uroplatus fimbriatus) on tree, Marojejy National Park, Madagascar

Wim van den Heever / African elephant (Loxodonta africana) grazing in an open field with a full moon rising near Baobab tree (Adansonia digitata). With tourists on safari under the tree. Savuti Marsh, Botswana, May 2014.

Katherine Feng / Giant Panda (Ailuropoda melanoleuca) eight month old cub in tree, Chengdu, Sichuan, China

Kevin Schafer / Guatemalan Black Howler Monkey (Alouatta pigra) climbing, Community Baboon Sanctuary, Belize, Central America. Endangered species.

Jussi Murtosaari / Mute Swans (Cygnus olor) foraging, southwest Finland, February.

Theo Bosboom,Theo Bosboom / Lily pads (Nymphaceae) with the reflections of pine trees, with water reflections, Tresticklan National Park, Southwest Sweden, September

Donald M. Jones / Eastern Fox Squirrel (Sciurus niger) hanging in tree, Great Falls, Montana