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

David Fleetham / Curious Humpback whale calf (Megaptera novaeangliae) during moment away from its mother, Hawaii.

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

Lucas Bustamante / Brush footed butterfly (Lycorea sp.) caterpillar with parasitic wasp cocoons on silk threads, Yasuni National Park, Orellana, Ecuador.

Ingo Arndt / Kingfisher (Alcedo atthis) diving into water to catch a fish, Hessen, Germany, sequence 1/9

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) mother and four month old young, Isla Escudo de Veraguas, Panama

Suzi Eszterhas / Pygmy Three-toed Sloth (Bradypus pygmaeus) four month old baby scratching, Isla Escudo de Veraguas, Panama

Chien Lee / Fantastic Leaf-tail Gecko (Uroplatus phantasticus) female mimicking wilting leaf, Ranomafana National Park, Madagascar

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

Alan Murphy/ BIA / White-breasted Nuthatch (Sitta carolinensis), Arizona

Neil Aldridge / Lesser masked weaver (Ploceus intermedius) male hanging upside down from the entrance, Northern Tuli Game Reserve, Botswana.

Bence Mate / Montezuma oropendola (Psarocolius montezuma) hanging upside down as part of a courtship display. Costa Rica.