Daniel Nunez / Black-banded cat-eyed snake (Leptodeira nigrofasciata) coiled up, Heloderma Natural Reserve, Motagua Valley, Guatemala.

Ann & Steve Toon / White rhinoceros (Ceratotherium simum) female and calf at waterhole at night, Zimanga private game reserve, KwaZulu-Natal, South Africa.

Ann & Steve Toon / White-backed vultures (Gyps africanus) flock perched in tree, silhouetted at sunrise, Mashatu game reserve, Botswana. Critically endangered.

Alex Mustard / Close up showing the colours and textures of the curling arms of a Crinoid on a coral reef, Anilao, Batangas marine protected area, Luzon, Philippines, Pacific Ocean.

Alex Mustard / Saddleback anemonefish (Amphiprion polymnus) and a Spotted porcelain crab (Neopetrolisthes maculatus) living together in an anemone. Bitung, North Sulawesi, Indonesia, Lembeh Strait, Molucca Sea.

Bernard Castelein / Four Sanderlings (Calidris alba) foraging at low tide, Zeeland, The Netherlands. February.

Bernard Castelein / Great spotted woodpecker (Dendrocopos major) juvenile, perched on branch, Brasschaat, Belgium. July.

Bernard Castelein / Green-veined white butterfly (Pieris napi) resting on Purple loosestrife (Lythrum salicaria), Brasschaat, Belgium. August.

Bernard Castelein / Nursery web spider (Pisaura mirabilis) female, resting on dew covered wrapping cover of its breeding ball, Klein Schietveld, Brasschaat, Belgium. July.

Joel Sartore / Photo Ark / Usambara three-horned chameleon (Trioceros deremensis) looking around, Tiergarten Schonbrunn, Vienna. Captive.

Joel Sartore / Photo Ark / Hoge's side-necked turtle (Ranacephala hogei) looking around. This species is endemic to the eastern Atlantic Forest of Brazil. Turtle Island, Graz, Austria. Critically endangered. Controlled conditio...

Joel Sartore / Photo Ark / Black softshell turtle (Nilssonia nigricans) extending neck, showing folded skin, and looking around. This species is endemic to India and Bangladesh. Turtle Island, Graz, Austria. Critically endanger...