Lucas Bustamante / Galapagos sea lion (Zalophus wollebaeki) diving, Wolf Island, Galapagos Islands, Pacific Ocean.

Lucas Bustamante / Black caiman (Melanosuchus niger) head half submerged in river, Yasuni National Park, Amazon Basin, Ecuador.

Lucas Bustamante / Two Torrent ducks (Merganetta armata) resting on a rock in fast flowing mountain river, Guango, Napo, Ecuador.

Lucas Bustamante / Two Speckled moray eels (Gymnothorax dovii) feeding on a Sea turtle carcass on the seabed, Wolf Island, Galapagos Islands, Pacific Ocean.

Lucas Bustamante / Pair of Lava gulls (Leucophaeus fuliginosus) during courtship, Genovesa Island, Galapagos Islands, Ecuador.

Lucas Bustamante / Peacock katydid (Pterochroza ocellata) on leaf in defensive posture, Yasuni National Park, Amazon Basin, Ecuador.

Lucas Bustamante / Andean bear / Spectacled bear (Tremarctos ornatus) looking down from a branch in the cloudforest, Maquipucuna, Pichincha, Ecuador.

Lucas Bustamante / Marine iguana (Amblyrhynchus cristatus) feeding on algae on the seabed, Fernandina Island, Galapagos Islands, Pacific Ocean.

Lucas Bustamante / Galapagos sea lion (Zalophus wollebaeki) resting on beach getting caught in foamy tide, Espanola Island, Galapagos Islands, Ecuador.

Lucas Bustamante / Horned sea star / Chocolate chip sea star (Protoreaster nodosus) on the rocky seabed, Isabela Island, Galapagos Islands, Pacific Ocean.

Lucas Bustamante / Three Brown noddies / Common noddies (Anous stolidus) trying to steal a fish from a Brown pelican (Pelecanus occidentalis), Santiago Island, Galapagos Islands, Pacific Ocean.

Lucas Bustamante / Puma (Puma concolor) walking with the Torres del Paine mountains in background, Torres del Paine National Park, Magallanes, Chile.

Lucas Bustamante / Puma (Puma concolor) female, grooming her cub, Torres del Paine National Park, Magallanes, Chile.

Franco Banfi / Leopard grouper (Mycteroperca rosacea) and Dentex (Dentex dentex) hunting a huge school of Sardines (Sardina pilchardus) in shallow water, Espiritu Santo archipelago, Sea of Cortez, Mexico. Ocean Pho...

Franco Banfi / Brandt's cormorant (Phalacrocorax penicillatus) hunting a huge school of Pilchards (Sardina pilchardus) at sunset, Espiritu Santo archipelago, Sea of Cortez, Baja California Sur, Mexico.

Nick Garbutt / Puma (Puma concolor) female, walking in front of Torres del Paine massif, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Puma (Puma concolor) female, running in deep fresh, snow, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Puma (Puma concolor) female with two cubs, aged six months, sitting in fresh snow, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Puma (Puma concolor) cub, aged nine months, walking in deep, fresh snow, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Patagonian / Austral pygmy owl (Glaucidium nana) perched on branch in snow, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Guanaco (Lama guanicoe) dusted in snow, head portrait, Torres del Paine National Park, Patagonia, Chile.

Nick Garbutt / Puma (Puma concolor) female, walking in deep fresh, snow, Torres del Paine National Park, Patagonia, Chile.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) drinking from drizzle puddles on top of boulder on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) resting in lava tube cave, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) swimming in shallows, Canal Itabaca, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Tourist group snorkelling above school of Razor surgeonfish (Prionurus laticlavius), Champion Islet, Floreana Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Playful Galapagos sea lion (Zalophus wollebaeki) pups curiously watching tourist group, Cerro Brujo, San Cristobal Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Swallow-tailed gull (Creagrus furcatus), in non-breeding plumage, rarely seen ashore, walking across beach, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Pair of Swallow-tailed gulls (Creagrus furcatus) incubating eggs on nest, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Spotted eagle ray (Aetobatus narinari) swimming through shallows, Los Tuneles, Cabo Rosa, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Spotted eagle ray (Aetobatus narinari) swimming through shallows, Los Tuneles, Cabo Rosa, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Group of Spotted eagle rays (Aetobatus narinari) swimming at water surface, Los Tuneles, Cabo Rosa, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Spotted eagle ray (Aetobatus narinari) resting in mangrove inlet, Venecia, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Spotted eagle ray (Aetobatus narinari) resting in mangrove inlet, Venecia, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Short-eared owl (Asio flammeus) perched on branch, Los Gemelos, Highlands, Santa Cruz Island, Galapagos Islands, Ecuador.

Tui De Roy / Head close up of Short-eared owl (Asio flammeus), Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Short-eared owl (Asio flammeus) perched on branch, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Short-eared owl (Asio flameus) perched on branch, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Short-eared owl (Asio flammeus) feeding on caught bird, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Short-eared owl (Asio flammeus) scratching head, perched on branch, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Ruddy turnstone (Arenaria interpres), in winter plumage, on sandy beach, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador.

Tui De Roy / Male Marine iguana (Amblyrhynchus cristatus), in bright breeding colours particular to Espanola Island, with darker female, basking in sun, Galapagos Islands, Ecuador.

Tui De Roy / Female Lava heron (Butorides sundevalli) catching and eating lava lizard (Microlophus), Galapagos Islands, Ecuador.

Andy Rouse / Jaguar (Panthera onca), female, sitting on dead tree, with cub hiding beneath, Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) sitting on riverbank, preparing to hunt. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca), young male, sleeping in late sunlight, Pantanal, Brazil.

Andy Rouse / Jaguars (Panthera onca), female with cub behind, sitting on dead tree, Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) drinking from riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil.

Andy Rouse / Jaguar (Panthera onca) swimming in river. Pantanal, Brazil

Andy Rouse / Jaguar (Panthera onca) swimming across wide river. Pantanal, Brazil

Andy Rouse / Jaguar (Panthera onca) sleeping during heat of day. Pantanal, Brazil

Andy Rouse / Jaguar (Panthera onca) sleeping during heat of day. Pantanal, Brazil

Andy Rouse / Jaguar (Panthera onca) yawning . Pantanal, Brazil.

Andy Rouse / RF - Jaguar (Panthera onca), young male, relaxing in late sunlight. Pantanal, Brazil. (This image may be licensed either as rights managed or royalty free.)

Andy Rouse / RF - Jaguar (Panthera onca) yawning. Pantanal, Brazil. (This image may be licensed either as rights managed or royalty free.)

Andy Rouse / RF - Jaguar (Panthera onca) walking along riverbank. Pantanal, Brazil. (This image may be licensed either as rights managed or royalty free.)

Andy Rouse / RF - Jaguar (Panthera onca) swimming in river. Pantanal, Brazil. (This image may be licensed either as rights managed or royalty free.)

Tui De Roy / American flamingo (Phoenicopterus ruber) filter feeding for small invertebrates in salt pond, Quinta Playa, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / American flamingos (Phoenicopterus ruber) wading through salt pond, Quinta Playa, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) gathering together to drink from drizzle puddles on flat lava during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) resting during dry season, Alcedo Volcano, Isabela Island, Galapagos, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) resting, head on foot, during dry season, Alcedo Volcano, Isabela Island, Galapagos, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) resting, head on feet, during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) performing aggressive display between two large males, the tallest being the winner, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Detail of hind toes of Alcedo giant tortoise (Chelonoidis vandenburghi), Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) drinking from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Darwin's Small ground finch (Geospiza fuliginosa) cleaning Alcedo giant tortoise (Chelonoidis vandenburghi) of ticks, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Darwin's Small ground finch (Geospiza fuliginosa) cleaning Alcedo giant tortoise (Chelonoidis vandenburghi) of ticks, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) drinking from drizzle puddles on top of boulder on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Head close up of Alcedo giant tortoise (Chelonoidis vandenburghi), coming to drink from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos I...

Tui De Roy / Darwin's Small ground finch (Geospiza fuliginosa) cleaning Alcedo giant tortoise (Chelonoidis vandenburghi) of ticks, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) drinking from muddy fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) gathering together on caldera rim with fog rolling in during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoise (Chelonoidis vandenburghi) walking around caldera rim with fog rolling in during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) drinking from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) drinking from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) drinking from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Alcedo giant tortoises (Chelonoidis vandenburghi) drinking from fog-drip puddles under mossy trees on caldera rim during dry season, Alcedo Volcano, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Blacktip cardinalfish (Apogon atradorsatus) sheltering in cave during daytime, Sombrero Chino Islet, Santiago Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) resting in lava tube cave, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) swimming in shallows, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) swimming in shallows with snorkeller in background, El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef shark (Triaenodon obesus) and shoals of fish swimming in shallows, Canal Itabaca, Santa Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Whitetip reef sharks (Triaenodon obesus) sheltering in mangrove inlet, Venecia, Sanata Cruz Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Pair of White-cheeked pintails (Anas bahamensis galapagensis), distinct subspecies, filter feeding through pond, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador.

Tui De Roy / Flock of Whimbrels (Numenius phaeopus), regular migrant from Arctic, flying, Quinta Playa, Isabela Island, Galapagos Islands, Ecuador.

Tui De Roy / Whimbrel (Numenius phaeopus), regular migrant from Arctic, feeding on fiddler crab, Puerto Ayora, Santa Cruz Island, Galapagos Islands, Ecuador.

Tui De Roy / Split level view of Red mangrove (Rhizophora mangle), El Finado, Isabela Island, Galapagos Islands, Ecuador. Pacific Ocean.

Tui De Roy / Two Red-footed booby (Sula sula) perched on branches, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Red-footed booby (Sula sula) perched on branch, Genovesa Island, Galapagos Islands, Ecuador.

Tui De Roy / Red-footed booby (Sula sula) chick and parent perched on branch near nest, Genovesa Island, Galapagos Islands, Ecuador.