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Chestnut Short-tailed Bat (Carollia castanea) flying, La Selva Biological Reserve, Costa Rica
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Piotr Naskrecki / Chestnut Short-tailed Bat (Carollia castanea) flying, La Selva Biological Reserve, Costa Rica
Silky Short-tailed Bat (Carollia brevicauda) flying, La Selva Biological Reserve, Costa Rica
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Piotr Naskrecki / Silky Short-tailed Bat (Carollia brevicauda) flying, La Selva Biological Reserve, Costa Rica
Mayfly subimago, La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Mayfly subimago, La Selva Biological Research Station, Heredia, Costa Rica
Common big-eared / Leaf nosed bat (Micronycteris microtis) head portrait, La Selva Biological Station, Costa Rica
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Solvin Zankl / Common big-eared / Leaf nosed bat (Micronycteris microtis) head portrait, La Selva Biological Station, Costa Rica
Ogre-faced Spider (Deinopis sp) do not wait passively for an insect to fall into their web, instead, they cast sticky nets, La Selva Biological Station, Costa Rica
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Piotr Naskrecki / Ogre-faced Spider (Deinopis sp) do not wait passively for an insect to fall into their web, instead, they cast sticky nets, La Selva Biological Station, Costa Rica
White-necked Jacobin (Florisuga mellivora) hummingbird male feeding on nectar from a Bromeliad flower, La Selva Biological Research Station, Rainforest, Costa Rica
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Michael & Patricia Fogden / White-necked Jacobin (Florisuga mellivora) hummingbird male feeding on nectar from a Bromeliad flower, La Selva Biological Research Station, Rainforest, Costa Rica
Lianas in interior of lowland rainforest, La Selva Biological Research Station, Costa Rica
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Michael & Patricia Fogden / Lianas in interior of lowland rainforest, La Selva Biological Research Station, Costa Rica
Honduran White Bat (Ectophylla alba) flying, La Selva Biological Reserve, Costa Rica
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Piotr Naskrecki / Honduran White Bat (Ectophylla alba) flying, La Selva Biological Reserve, Costa Rica
Honduran White Bat (Ectophylla alba) flying, La Selva Biological Reserve, Costa Rica
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Piotr Naskrecki / Honduran White Bat (Ectophylla alba) flying, La Selva Biological Reserve, Costa Rica
Cat-eyed snake (Leptodeira septentrionalis) from La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Cat-eyed snake (Leptodeira septentrionalis) from La Selva Biological Station, Costa Rica. Controlled conditions.
Blunt-headed tree snake (Imantodes cenchoa) at La Selva Biological Station, Costa Rica. Controlled conditions.
01593246
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) at La Selva Biological Station, Costa Rica. Controlled conditions.
Ringed snail-sucker (Sibon annulatus) La Selva Biological Station, Costa Rica. Controlled conditions.
01593243
Jen Guyton / Ringed snail-sucker (Sibon annulatus) La Selva Biological Station, Costa Rica. Controlled conditions.
Plumed basilisk (Basiliscus plumifrons) female, La Selva Biological Station, Costa Rica. Controlled conditions.
01593240
Jen Guyton / Plumed basilisk (Basiliscus plumifrons) female, La Selva Biological Station, Costa Rica. Controlled conditions.
Eyelash viper (Bothriechis schlegelii) waiting for prey on the trunk of a tree, La Selva Biological Station, Costa Rica. Small repro only.
01593239
Jen Guyton / Eyelash viper (Bothriechis schlegelii) waiting for prey on the trunk of a tree, La Selva Biological Station, Costa Rica. Small repro only.
Speckled tree snake (Imantodes inornatus) on a heliconia flower, La Selva Biological Station, Costa Rica.
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Jen Guyton / Speckled tree snake (Imantodes inornatus) on a heliconia flower, La Selva Biological Station, Costa Rica.
Speckled tree snake (Imantodes inornatus) from La Selva Biological Station, Costa Rica. Controlled condtions.
01593232
Jen Guyton / Speckled tree snake (Imantodes inornatus) from La Selva Biological Station, Costa Rica. Controlled condtions.
Ringed snail-sucker (Sibon annulatus) from La Selva Biological Station, Costa Rica. Controlled conditions.
01593229
Jen Guyton / Ringed snail-sucker (Sibon annulatus) from La Selva Biological Station, Costa Rica. Controlled conditions.
Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
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Jen Guyton / Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
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Jen Guyton / Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
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Jen Guyton / Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
Clouded snail-eater snake (Sibon nebulatus) La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Clouded snail-eater snake (Sibon nebulatus) La Selva Biological Station, Costa Rica. Controlled conditions.
Lichen-colored snail-sucker snake (Sibon longifrenis) from La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Lichen-colored snail-sucker snake (Sibon longifrenis) from La Selva Biological Station, Costa Rica. Controlled conditions.
Lichen-coloured snail-sucker snake (Sibon longifrenis) La Selva Biological Station, Costa Rica.
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Jen Guyton / Lichen-coloured snail-sucker snake (Sibon longifrenis) La Selva Biological Station, Costa Rica.
Fer-de-lance (Bothrops asper) hatchling on a blade of grass in a swamp, La Selva Biological Station, Costa Rica.
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Jen Guyton / Fer-de-lance (Bothrops asper) hatchling on a blade of grass in a swamp, La Selva Biological Station, Costa Rica.
Speckled tree snake (Imantodes inornatus)  stretching and moving forward on white background. La Selva Biological Station, Costa Rica. Controlled conditions.
01593291
Jen Guyton / Speckled tree snake (Imantodes inornatus) stretching and moving forward on white background. La Selva Biological Station, Costa Rica. Controlled conditions.
Speckled tree snake (Imantodes inornatus)  La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Speckled tree snake (Imantodes inornatus) La Selva Biological Station, Costa Rica. Controlled conditions.
Plumed basilisk (Basiliscus plumifrons) female, La Selva Biological Station, Costa Rica. Controlled conditions.
01593289
Jen Guyton / Plumed basilisk (Basiliscus plumifrons) female, La Selva Biological Station, Costa Rica. Controlled conditions.
Plumed basilisk (Basiliscus plumifrons) female La Selva Biological Station, Costa Rica.
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Jen Guyton / Plumed basilisk (Basiliscus plumifrons) female La Selva Biological Station, Costa Rica.
Eyelash viper (Bothriechis schlegelii) waitingfor prey on tree trunk,  La Selva Biological Station, Costa Rica.
01593287
Jen Guyton / Eyelash viper (Bothriechis schlegelii) waitingfor prey on tree trunk, La Selva Biological Station, Costa Rica.
Clouded snail-eater snake  (Sibon nebulatus) at La Selva Biological Station, Costa Rica.
01593286
Jen Guyton / Clouded snail-eater snake (Sibon nebulatus) at La Selva Biological Station, Costa Rica.
Calico snake (Oxyrhopus petolarius) juvenile, from La Selva Biological Station, Costa Rica. Controlled conditions. Non-venomous snakes mimic venomous coral snakes.
01593285
Jen Guyton / Calico snake (Oxyrhopus petolarius) juvenile, from La Selva Biological Station, Costa Rica. Controlled conditions. Non-venomous snakes mimic venomous coral snakes.
Blunt-headed tree snake (Imantodes cenchoa) juvenile tastes the air at La Selva Biological Station, Costa Rica.
01593284
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) juvenile tastes the air at La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.
01593283
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.
Ringed tree boa (Corallus annulatus)  La Selva Biological Station, Costa Rica.
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Jen Guyton / Ringed tree boa (Corallus annulatus) La Selva Biological Station, Costa Rica.
Eyelash viper (Bothriechis schlegelii) waiting for prey on tree, La Selva Biological Station, Costa Rica.
01593278
Jen Guyton / Eyelash viper (Bothriechis schlegelii) waiting for prey on tree, La Selva Biological Station, Costa Rica.
Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
01593270
Jen Guyton / Ringed tree boa (Corallus annulatus) at La Selva Biological Station, Costa Rica.
Fer-de-lance (Bothrops asper) hatchling on a blade of grass in a swamp, La Selva Biological Station, Costa Rica
01593264
Jen Guyton / Fer-de-lance (Bothrops asper) hatchling on a blade of grass in a swamp, La Selva Biological Station, Costa Rica
Clouded snail-eater (Sibon nebulatus) La Selva Biological Station, Costa Rica.
01593263
Jen Guyton / Clouded snail-eater (Sibon nebulatus) La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.
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Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) La Selva Biological Station, Costa Rica.
Helmeted iguana (Corytophanes cristatus) La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Helmeted iguana (Corytophanes cristatus) La Selva Biological Station, Costa Rica. Controlled conditions.
Cat-eyed snake (Leptodeira septentrionalis) on branch with the eggs of a Parachuting red-eyed tree frog (Agalychnis saltator).  La Selva Biological Station, Costa Rica,
01593340
Jen Guyton / Cat-eyed snake (Leptodeira septentrionalis) on branch with the eggs of a Parachuting red-eyed tree frog (Agalychnis saltator). La Selva Biological Station, Costa Rica,
Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
01593339
Jen Guyton / Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
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Naskrecki & Guyton / Helmeted iguana (Corytophanes cristatus) at La Selva Biological Station, Costa Rica.
Yellow-spotted tropical night lizard (Lepidophyma flavimaculatum) from La Selva Biological Station, Costa Rica. Controlled conditions.
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Jen Guyton / Yellow-spotted tropical night lizard (Lepidophyma flavimaculatum) from La Selva Biological Station, Costa Rica. Controlled conditions.
Cat-eyed snake (Leptodeira septentrionalis) from La Selva Biological Station, Costa Rica. Photographed in a studio.
01593353
Jen Guyton / Cat-eyed snake (Leptodeira septentrionalis) from La Selva Biological Station, Costa Rica. Photographed in a studio.
Brown wood turtle (Rhinoclemmys annulata) resting on a rock in a stream. La Selva Biological Station, Costa Rica,
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Jen Guyton / Brown wood turtle (Rhinoclemmys annulata) resting on a rock in a stream. La Selva Biological Station, Costa Rica,
Calico snake (Oxyrhopus petolarius) juvenile from La Selva Biological Station, Costa Rica. Non-venomous snake which mimics venomous coral snakes.
01593349
Jen Guyton / Calico snake (Oxyrhopus petolarius) juvenile from La Selva Biological Station, Costa Rica. Non-venomous snake which mimics venomous coral snakes.
Speckled tree snake (Imantodes inornatus) on a Heliconia flower, La Selva Biological Station, Costa Rica.
01593345
Jen Guyton / Speckled tree snake (Imantodes inornatus) on a Heliconia flower, La Selva Biological Station, Costa Rica.
Black-mandibled Toucan (Ramphastos ambiguus) in rainforest canopy, La Selva Biological Research Station, Costa Rica
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Greg Basco/ BIA / Black-mandibled Toucan (Ramphastos ambiguus) in rainforest canopy, La Selva Biological Research Station, Costa Rica
Collared aracari (Pteroglossus torquatus) plucks fruit off a branch at La Selva Biological Station, Costa Rica.
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Jen Guyton / Collared aracari (Pteroglossus torquatus) plucks fruit off a branch at La Selva Biological Station, Costa Rica.
Collared aracari (Pteroglossus torquatus) at La Selva Biological Station, Costa Rica.
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Jen Guyton / Collared aracari (Pteroglossus torquatus) at La Selva Biological Station, Costa Rica.
Green iguana (Iguana iguana) rests on a log, La Selva Biological Station, Costa Rica.
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Jen Guyton / Green iguana (Iguana iguana) rests on a log, La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) rests on a leaf at La Selva Biological Station, Costa Rica.
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Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) rests on a leaf at La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa)  hangs from a branch and tastes the air. La Selva Biological Station, Costa Rica.
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Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) hangs from a branch and tastes the air. La Selva Biological Station, Costa Rica.
Neotropical green anole (Anolis biporcatus) on a tree, La Selva Biological Station, Costa Rica.
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Jen Guyton / Neotropical green anole (Anolis biporcatus) on a tree, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving from branch to branch. La Selva Biological Station, Costa Rica.
01567748
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving from branch to branch. La Selva Biological Station, Costa Rica.
Speckled blunthead tree snake (Imantodes inornatus) among vines and lianas in the rainforest at La Selva Biological Station, Costa Rica.
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Jen Guyton / Speckled blunthead tree snake (Imantodes inornatus) among vines and lianas in the rainforest at La Selva Biological Station, Costa Rica.
Annulated tree boa (Corallus annulatus) resting on a log at La Selva Biological Station, Costa Rica.
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Jen Guyton / Annulated tree boa (Corallus annulatus) resting on a log at La Selva Biological Station, Costa Rica.
Snail-eating snake (Sibon nebulata) extracts a snail from its shell by wedging the shell in the fork of a branch and pulling at the snail's soft body. La Selva Biological Station, Costa Rica.
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Jen Guyton / Snail-eating snake (Sibon nebulata) extracts a snail from its shell by wedging the shell in the fork of a branch and pulling at the snail's soft body. La Selva Biological Station, Costa Rica.
Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
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Jen Guyton / Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
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Jen Guyton / Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
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Jen Guyton / Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
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Jen Guyton / Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
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Jen Guyton / Strawberry poision arrow frog (Oophaga pumilio) photographed in studio at La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
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Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
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Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567765
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567764
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567763
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567762
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567761
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
01567760
Jen Guyton / Blunt-headed tree snake (Imantodes cenchoa) moving on abranch, La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
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Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
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Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
01567757
Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
01567756
Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
01567755
Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
01567754
Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
01567753
Jen Guyton / Red-eyed tree frog (Agalychnis callidryas) among the vegetation at La Selva Biological Station, Costa Rica.
Hourglass tree frog (Dendropsophus ebraccatus) on a tree trunkt La Selva Biological Station, Costa Rica.
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Jen Guyton / Hourglass tree frog (Dendropsophus ebraccatus) on a tree trunkt La Selva Biological Station, Costa Rica.
Hourglass tree frog (Dendropsophus ebraccatus) on moss covered leaf at La Selva Biological Station, Costa Rica.
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Jen Guyton / Hourglass tree frog (Dendropsophus ebraccatus) on moss covered leaf at La Selva Biological Station, Costa Rica.
Hourglass tree frog (Dendropsophus ebraccatus) on moss covered leaf at La Selva Biological Station, Costa Rica.
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Jen Guyton / Hourglass tree frog (Dendropsophus ebraccatus) on moss covered leaf at La Selva Biological Station, Costa Rica.
White-crowned Parrot (Pionus senilis) pair, La Selva Biological Reserve, Costa Rica
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Sean Crane / White-crowned Parrot (Pionus senilis) pair, La Selva Biological Reserve, Costa Rica
Keel-billed Toucan (Ramphastos sulfuratus)and bromeliad, La Selva Biological Reserve, Costa Rica
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Sean Crane / Keel-billed Toucan (Ramphastos sulfuratus)and bromeliad, La Selva Biological Reserve, Costa Rica
Chestnut-mandibled Toucan (Ramphastos swainsonii) eating berries, La Selva Biological Reserve, Costa Rica
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Sean Crane / Chestnut-mandibled Toucan (Ramphastos swainsonii) eating berries, La Selva Biological Reserve, Costa Rica
Misfit Leaf Frog (Agalychnis saltator) mass mating, La Selva Biological Research Station, Costa Rica
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Christian Ziegler / Misfit Leaf Frog (Agalychnis saltator) mass mating, La Selva Biological Research Station, Costa Rica
Red-eyed Tree Frog (Agalychnis callidryas) seen from below, La Selva Biological Research Station, Costa Rica
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Christian Ziegler / Red-eyed Tree Frog (Agalychnis callidryas) seen from below, La Selva Biological Research Station, Costa Rica
Misfit Leaf Frog (Agalychnis saltator) pair mating in foreground, La Selva Biological Research Station, Costa Rica
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Christian Ziegler / Misfit Leaf Frog (Agalychnis saltator) pair mating in foreground, La Selva Biological Research Station, Costa Rica
Treehopper (Umbonia crassicornis) mimicking thorn, La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Treehopper (Umbonia crassicornis) mimicking thorn, La Selva Biological Research Station, Heredia, Costa Rica
Lantern Bug (Fulgora sp) spreading wings showing false eyespots, La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Lantern Bug (Fulgora sp) spreading wings showing false eyespots, La Selva Biological Research Station, Heredia, Costa Rica
Lantern Bug (Fulgora sp), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Lantern Bug (Fulgora sp), La Selva Biological Research Station, Heredia, Costa Rica
Lantern Bug (Fulgora sp), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Lantern Bug (Fulgora sp), La Selva Biological Research Station, Heredia, Costa Rica
Tico Katydid (Melanonotus tico), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Tico Katydid (Melanonotus tico), La Selva Biological Research Station, Heredia, Costa Rica
Katydid (Thamnobates subfalcata), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Katydid (Thamnobates subfalcata), La Selva Biological Research Station, Heredia, Costa Rica
Bess Beetle (Passalidae), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Bess Beetle (Passalidae), La Selva Biological Research Station, Heredia, Costa Rica
Cane Toad (Bufo marinus), La Selva Biological Research Station, Heredia, Costa Rica
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Piotr Naskrecki / Cane Toad (Bufo marinus), La Selva Biological Research Station, Heredia, Costa Rica