Bence Mate / Green / Double-crested basilisk (Basiliscus plumifrons) running across water surface, Santa Rita, Costa Rica. Did you know? This amazing lizard is colloquially known as the 'Jesus Christ lizard' for i...

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 18 days development, the tadpoles are fully developed and ready to hatch, Ecuador. Endangered. (non-ex)

Morley Read / Close-up of Agua rica leaf frog (Phyllomedusa ecuatoriana) eggs after 11 days development, showing beating heart and blood flowing over gills, Ecuador. Endangered. (non-ex)

Morley Read / Developing embryo of the Ecuadorian monkey frog (Phyllomedusa ecuatoriana), showing heart beating and blood flowing, Morona Santiago Province, Ecuador, (non-ex)

Melvin Grey / Purple-throated mountain gem (Lampornis calolaemus) adult female - about to feed from flower, Atlantic Rainforest, Costa Rica.

Nick Hawkins / Rocks and coastal rainforest. Cocos Island National Park, Costa Rica. 2018.

Nick Hawkins / Fish seeking shelter around floating tree in open ocean. Off coast of Cocos Island National Park, Costa Rica.

Nick Hawkins / Silky shark (Carcharhinus falciformis). Cocos Island National Park, Costa Rica.

Paul Hobson / Rufous motmot (Baryphthengus martii) perched on branch. Rancho Naturalista, Cartago, Costa Rica.

Paul Hobson / Resplendent quetzal (Pharomachrus mocinno) male perched on branch. Costa Rica.

Paul Hobson / Parrot snake (Leptophis ahaetulla) in aggressive pose with mouth open. Costa Rica.

Paul Hobson / Rivoli's hummingbird (Eugenes fulgens) nectaring on Fuchsia (Fuchsia sp) flower. Costa Rica.

Paul Hobson / Leaf-nosed bat (Phyllostomidae sp), three nectaring on flower. Costa Rica.

Paul Hobson / Leaf-nosed bat (Phyllostomidae sp) flying towards Banana (Musa sp) flower to feed. Costa Rica.

Paul Hobson / Keel-billed toucan (Ramphastos sulfuratus) perched on branch with beak open. Laguna del Lagarto, Alajuela, Costa Rica.

Paul Hobson / Green-crowned brilliant (Heliodoxa jacula), three feeding on Lobster-claw (Heliconia sp) flower in rain. Costa Rica.

Paul Hobson / Violet sabrewing hummingbird (Campylopterus hemileucurus) nectaring on Orchid. Costa Rica.

Ingo Arndt / Royal Flycatcher (Onychorhynchus coronatus) in defensive posture, Santa Rosa National Park, Costa Rica

Ingo Arndt / Royal Flycatcher (Onychorhynchus coronatus) in defensive posture, Santa Rosa National Park, Costa Rica

Phil Savoie / White tent making bat (Ectophylla alba) roosting in Heleconia leaf, La Selva Field Station, Costa Rica.

Glenn Bartley/ BIA / Keel-billed Toucan (Ramphastos sulfuratus), Costa Rica

Glenn Bartley/ BIA / Great Curassow (Crax rubra), Costa Rica

Glenn Bartley/ BIA / Black-mandibled Toucan (Ramphastos ambiguus) during rainfall, Costa Rica

Piotr Naskrecki / Banded Tree Snake (Tripanurgos compressus), Costa Rica

Piotr Naskrecki / Grasshopper (Tropidacris cristata) on hand, Costa Rica

Piotr Naskrecki / Toltec Fruit-eating Bat (Artibeus toltecus) flying, Monteverde Cloud Forest Reserve, Costa Rica

Piotr Naskrecki / Chestnut Short-tailed Bat (Carollia castanea) flying, La Selva Biological Reserve, Costa Rica

Piotr Naskrecki / Hairy Big-eyed Bat (Chiroderma villosum) flying, Costa Rica

Piotr Naskrecki / Silky Short-tailed Bat (Carollia brevicauda) flying, La Selva Biological Reserve, Costa Rica

Piotr Naskrecki / Niceforo's Big-eared Bat (Trinycteris nicefori) flying, Costa Rica

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Jen Guyton / American crocodiles (Crocodylus acutus) in the Rio Tarcoles, Costa Rica.

Donald M. Jones / Resplendent Quetzal (Pharomachrus mocinno) male, Costa Rica

Donald M. Jones / Red-lored Parrot (Amazona autumnalis), Costa Rica

Phil Savoie / Reticulated glass frog (Hyalinobatrachium valerioi) La Selva Field Station, Costa Rica.

Phil Savoie / Green-crowned brillian hummingbird (Heliodoxa jacula) visiting Torch ginger flower (Etlingera elatior), Poas Volcano National Park Costa Rica

Greg Basco/ BIA / Baird's Tapir (Tapirus bairdii) in rainforest, Corcovado National Park, Costa Rica

Greg Basco/ BIA / Nauyaca Waterfalls, Dominical, Costa Rica

Graeme Guy/ BIA / Green-breasted Mango (Anthracothorax prevostii) male feeding on flower nectar, Costa Rica

Paul Bertner / Dead Leaf Katydid (Orophus tessellatus) camouflaged in leaf litter, Hitoy Cerere Biological Reserve, Costa Rica

Paul Bertner / Giant Crab Spider (Sparassidae) juvenile, Hitoy Cerere Biological Reserve, Costa Rica

Paul Bertner / Fulgorid Planthopper (Phrictus quinquepartitus) in defensive posture, Braulio Carrillo National Park, Costa Rica

Ingo Arndt / American Crocodile (Crocodylus acutus) swimming in open ocean, Pacific Coast, Ostional, Costa Rica

Ingo Arndt / Red-eyed tree frog (Agalychnis callidryas) eye closed with semi-transparent eyelid that allows it to see its surroundings even while resting, Costa Rica.

Ingo Arndt / Red-eyed Tree Frog (Agalychnis callidryas) close- up of eye half open, the golden webbed semi-transparent eyelid allows to see its surrounding even while resting, Costa Rica.

Ingo Arndt / Villagers collecting eggs from Olive ridley sea turtles (Lepidochelys olivacea) during the first two days of the arribada (mass nesting event). This is the only place in the world where it is legal to...

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) digging their nests by night with stars during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore at twilight during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Olive ridley sea turtles (Lepidochelys olivacea) females coming ashore during an arribada (mass nesting event) to lay eggs, Pacific Coast, Ostional, Costa Rica.

Ingo Arndt / Close-up of eyes on wing of Common Morpho butterfly (Morpho peleides) Costa Rica

Ingo Arndt / Orbweaver spider {Eriophora nephiloides} Costa Rica

Ingo Arndt / Tropical rainforest / cloud forest scenic, Monteverde National Park, Costa Rica

Ingo Arndt / Saturniid moth caterpillar close up of spines {Automeris banus} Costa Rica

Ingo Arndt / Saturniid moth caterpillar close up of spines {Syssphinx mexicana} Costa Rica

Ingo Arndt / Slug caterpillar moth larva {Acharia nesea} Guanacaste, Costa Rica

Ingo Arndt / Slug caterpillar moth larva mimics bug {Limacodidae} Guanacaste, Costa Rica

Ingo Arndt / Brush footed butterfly caterpillar mimics snake {Archaeoprepona demophoon} Guanacaste, Costa Rica

Ingo Arndt / Looper moth caterpillar mimics twig {Geometridae} Guanacaste, Costa Rica

Ingo Arndt / Slug moth caterpillar mimics seed pod {Perola sp} Guanacaste, Costa Rica, Central America

Ingo Arndt / Saturniid moth caterpillar with warning colouration {Syssphinx mexicana} Guanacaste, Costa Rica

Ingo Arndt / Silkmoth caterpillar with eye spots to mimic snake {Oxytenis beprea} Guanacaste, Costa Rica

Ingo Arndt / Silkmoth caterpillar with eye spots to mimic snake {Oxytenis modestia} Guanacaste, Costa Rica, Central America

Nick Garbutt / Montane Glass Frog (Centrolenella ilex) inside curled leaf. Mid-altitude rainforest, Bosque de Paz, Pacific slope, Costa Rica, Central America.

Nick Garbutt / Green-and-Black Poison Dart Frog (Dendrobates auratus) inside bromiliad where it breeds. Boca Tapada, Caribbean slope, Costa Rica, Central America.

Nick Garbutt / Emerald Glass Frog (Centrolenella proseblepan) on leaf. Mid-altitude rainforest, Bosque de Paz, Pacific slope, Costa Rica, Central America.

Nick Garbutt / Pairs of Scarlet Macaws (Ara macao) in flight. Osa Peninsula (near Corcovado National Park), Costa Rica, Central America.

Nick Garbutt / Female Red-eyed Tree Frog (Agalychnis callidryas) - Caribbean slope race (blue flanks) - obscured in rainforest foliage. Mid-altitude rainforest near Aranal, central Costa Rica.

Glenn Bartley/ BIA / Collared Aracari (Pteroglossus torquatus) during rainfall, Costa Rica

Glenn Bartley/ BIA / Blue-gray Tanager (Thraupis episcopus), Costa Rica

Glenn Bartley/ BIA / Acorn Woodpecker (Melanerpes formicivorus), Costa Rica

Glenn Bartley/ BIA / Red-legged Honeycreeper (Cyanerpes cyaneus), Costa Rica

Bence Mate / White-throated Mountain Gem (Lampornis castaneoventris), Green-crowned Brilliant (Heliodoxa jacula) group of three with one in flight, Savegre, Costa Rica

Nick Hawkins / Ocelot (Leopardus pardalis) walking, camera trap image, Nicoya Peninsula, Costa Rica.

Nick Hawkins / Ocelot (Leopardus pardalis) portrait. camera trap image, Nicoya Peninsula, Costa Rica.

Nick Hawkins / Ocelot (Leopardus pardalis) grooming paw. camera trap image, Nicoya Peninsula, Costa Rica.

Nick Hawkins / Ocelot (Leopardus pardalis) camera trap image, Nicoya Peninsula, Costa Rica.

Nick Hawkins / Northern tamandua (Tamandua mexicana) climbing down tree, Nicoya Peninsula, Costa Rica, April 2013.

Nick Hawkins / Northern tamandua (Tamandua mexicana) Nicoya Peninsula, Costa Rica.

Nick Hawkins / Leaf mantis (Choeradodis sp.) Tortuguero National Park, Costa Rica.

Nick Hawkins / Green sea turtle female (Chelonia mydas) returning to the sea, Tortuguero National Park, Costa Rica.

Nick Hawkins / Jaguar (Panthera onca) camera trap image, Tortuguero National Park, Costa Rica.

Nick Hawkins / Jaguar (Panthera onca) camera trap image, Tortuguero National Park, Costa Rica.

Nick Hawkins / Common vampire bat (Desmodus rotundus) exiting cave, Costa Rica, March 2014.

Nick Hawkins / Common vampire bats (Desmodus rotundus) roosting in cave, Costa Rica.

Nick Hawkins / Neotropical river otter (Lontra longicaudis) in water, Nicoya Peninsula, Costa Rica, March 2015.

Nick Hawkins / Red-eyed treefrog (Agalychnis calidryas) Costa Rica, April 2015.

Alex Hyde / Fishing spider (Trechalea) waiting to catch a Killifish (Cyprinodontiformes) in a rainforest stream at night, Central Caribbean foothills, Costa Rica.

Alex Hyde / Hourglass treefrog (Dendropsophus ebraccatus) male with inflated vocal sac calling at night, Central Caribbean foothills, Costa Rica

Alex Hyde / Lemur leaf frog (Agalychnis lemur) Central Caribbean foothills, Costa Rica. IUCN Red List critically endangered species.

Alex Hyde / Cup fungus (Cookeina sp) growing on decaying wood on the rainforest floor, Corcovado National Park, Osa Peninsula, Costa Rica

Alex Hyde / Leaf-cutter ant (Atta cephalotes) carrying pieces of leaf that they have harvested back to their underground fungus garden in their nest, Osa Peninsula, Costa Rica

Alex Hyde / Leaf-cutter ants (Atta cephalotes) carrying pieces of leaf that they have harvested back to their underground fungus garden in their nest, Osa Peninsula, Costa Rica. Photographed in mobile field studi...

Alex Hyde / Leaf-cutter ants (Atta cephalotes) carrying pieces of leaf that they have harvested back to their underground fungus garden in their nest, Osa Peninsula, Costa Rica. Photographed in mobile field studi...

Alex Hyde / Lowland tropical rainforest understory vegetation dominated by (Cyclanthaceae) plants, Osa Peninsula, Costa Rica

Alex Hyde / Yellow-flecked glassfrogs (Sachatamia albomaculata) mating pair, Osa Peninsula, Costa Rica