Amphibians and Reptiles · Colombia
Amphibians and reptiles of Colombia
World capital of amphibians —850+ species, second worldwide after Brazil. Poison dart frogs, green anaconda, Orinoco crocodile, matamata turtle. Colombia herpetology tours operate night outings with herpetologists across the Choco, Amazon, Llanos and Andes.
Why Colombia is the world capital of amphibians
Colombia has more amphibian species than any country in the world after Brazil —863 confirmed species per the latest Humboldt Institute report—, and it leads everyone in endemism: roughly 200 endemic frog species, meaning they exist nowhere else on Earth. The reason is the same as for birds: three Andean cordilleras, two coastlines, the Amazon and Orinoquia basins, paramo and cloud forest. Each microhabitat isolated by altitudinal gradient generates unique species, particularly in the Atelopus (harlequin frogs) and Pristimantis (terrestrial rainfrogs) genera.
Colombia has 600+ confirmed reptile species: legendary serpents like the green anaconda and the South American rattlesnake, the Orinoco crocodile (one of the largest crocodilians in the world, critically endangered), spectacled caiman and black caiman, the matamata turtle (the most singular in the Amazon), green iguana and multiple tegu lizards. Serious herpetology operations in Colombia concentrate in the Choco (golden frog Phyllobates terribilis and other dendrobatids), Amazon (anaconda, matamata, dendrobatids), Llanos (Orinoco crocodile, anaconda, spectacled caiman, tegu) and Andean forest (Atelopus, Pristimantis).
The most iconic herps of Colombia
Twelve species that define the country’s herpetological imagination. Each with its region, its best season and the specific outing it requires.
| Species | Scientific name | Notes |
|---|---|---|
| Golden poison frog | Phyllobates terribilis | Endemic to the Choco, considered the most toxic animal in the world: a single frog can kill 10 humans. Found only in humid forest of the Colombian Pacific. Diurnal. |
| Blue poison frog | Dendrobates azureus | Bright blue dendrobatid. Its toxicity comes from ants and mites consumed in the wild. Present in zones of the Amazon trapezium in Colombia. |
| Harlequin frog | Atelopus spp | Genus with 96 species in Colombia, many critically endangered by chytrid fungus. Coloration varies yellow-black or orange-black. Diurnal, in paramo and Andean forest. |
| Green anaconda | Eunectes murinus | The heaviest snake in the world. Adult females 4–6 m, up to 200 kg. Aquatic, common in Casanare and Amazon wetlands. Reliable sightings in the Llanos dry season Dec–Mar. |
| Orinoco crocodile | Crocodylus intermedius | The most threatened crocodylia in South America, endemic to the Colombian-Venezuelan Llanos. Up to 7 m. Critically Endangered. Ex-situ conservation programs in Casanare and Vichada. |
| Spectacled caiman | Caiman crocodilus | Mid-size caiman (1.5–2.5 m), abundant in tropical wetlands. Llanos, Amazon, Choco. Guaranteed sightings in dry-season Casanare. Often confused with the Orinoco crocodile. |
| Matamata turtle | Chelus fimbriatus | The strangest turtle in the world. Three-keeled shell, long neck with leaf-like appendages, triangular head. Strictly aquatic. Black-water rivers of the Amazon. |
| Green iguana | Iguana iguana | Arboreal lizard up to 2 m. Common in gallery forest of the Llanos, Amazon and Caribbean. Diurnal. Often seen in trees along riverbanks. |
| South American rattlesnake | Crotalus durissus | Venomous snake of open savannah and dry scrub. Llanos and dry zones of the Caribbean. Audible rattle. Hemotoxic venom; care required on night hikes. |
| Boa constrictor | Boa constrictor | Non-venomous snake up to 4 m. Wide distribution in tropical forests. Active at night, kills by constriction. Common in the Llanos and Amazon. |
| Tegu lizard | Tupinambis teguixin | Large terrestrial lizard (up to 1.4 m), omnivore. Common on the Llanos savannah. Diurnal. Striking black-and-white pattern. |
| Black caiman | Melanosuchus niger | The largest crocodylia in the Amazon, up to 6 m. Heavily hunted in the 20th century, now recovering. Possible sightings in remote zones of the Colombian Amazon trapezium. |
Herp checklist by region (sighting probability)
Real probabilities based on our outing database (200+ recorded expeditions). High >70%, Medium 40–70%, Low 10–40%, Exceptional <10%.
Main reptiles
| Species | Llanos dry | Choco | Amazon | Andes |
|---|---|---|---|---|
| Green anaconda | High (Sept–Mar) | Exceptional | Medium | — |
| Boa constrictor | Medium | Medium | Medium | Low |
| Orinoco crocodile | High (specific ranches) | — | — | — |
| Spectacled caiman | High (year-round) | Medium | High | — |
| Black caiman | — | — | Medium (remote zones) | — |
| Green iguana | High | High | High | — |
| Tegu lizard | High | Low | Medium | — |
| Matamata turtle | Low | — | Medium (Puerto Narino) | — |
| South American rattlesnake | Medium (night hike) | — | Low | Low |
| Fer-de-lance / mapana | Low | Medium | Medium | Low |
Main amphibians
| Genus / species | Choco | Amazon | Andes (cloud forest) | Paramo |
|---|---|---|---|---|
| Phyllobates terribilis (golden frog) | High (specific zones) | — | — | — |
| Phyllobates aurotaenia / bicolor | Medium | — | — | — |
| Dendrobates azureus / leucomelas | Low | Medium | — | — |
| Oophaga histrionica | High (mid-Pacific) | — | — | — |
| Atelopus spp (harlequin frogs) | Low | — | Medium (key sites) | Medium |
| Pristimantis spp (terrestrial rainfrogs) | High | High | High | High |
| Hyla / Boana spp (tree frogs) | High at night | High at night | Medium | Low |
| Bufo / Rhinella spp (toads) | High | High | High | Medium |
| Lithobates / Leptodactylus (bullfrog) | High | High | Medium | Low |
| Caecilians (legless amphibians) | Exceptional | Exceptional | Exceptional | — |
Turtles
| Species | Llanos | Amazon | Pacific | Caribbean |
|---|---|---|---|---|
| Charapa / arrau | Medium (rivers) | High (nesting beaches) | — | — |
| Matamata turtle | Low | Medium | — | — |
| Hicotea slider | High | High | Low | Medium |
| Hawksbill (marine) | — | — | Medium (nesting) | Medium (nesting) |
| Green sea turtle (marine) | — | — | Medium | Medium |
Four key destinations for herpetology
Each destination has its lead species and best season. We run all four with trained herpetologists.
Choco — capital of poison dart frogs
Headline species: golden frog (Phyllobates terribilis), bicolor poison frog (P. bicolor), Oophaga histrionica, multiple Hyla tree frogs.
Best season: year-round (constant rain keeps amphibians active). Calling peak: Oct–Nov.
How it works: base lodge in Bahia Solano or Nuqui (5–7 days). Night outings with a herpetologist plus red headlamp. Humid-forest trails. Combines with whale watching (Jul–Oct).
Amazon — anaconda, matamata, frogs
Headline species: green anaconda, matamata turtle, river turtles, multiple dendrobatids (Dendrobates leucomelas, D. azureus), Hyla tree frogs and black caiman in remote zones.
Best season: Jun–Sep (low water, easier hiking). Mar–May (high water, better canopy plus active amphibians).
How it works: base in Leticia or Puerto Narino (4–6 days). Day hikes through forest, night outings with headlamp. River trips for matamata and pink dolphin. Visits to Huitoto and Ticuna community reserves.
Llanos (Casanare) — reptiles in the open
Headline species: Orinoco crocodile (on specific conservation ranches), spectacled caiman (high probability), green anaconda, tegu, green iguana, rattlesnake.
Best season: Dec–Mar (dry savannah, wildlife concentrated at remaining waterholes). Anaconda sightings most reliable in this window.
How it works: ranch safari (4–5 days). Outings by jeep, on foot, on horseback. Night walks for snakes in the late dry season. See the Llanos safari →
Andean forest and paramo — Atelopus and Pristimantis
Headline species: Atelopus harlequin frogs (96 species in Colombia, many critically threatened), Pristimantis rainfrogs (genus with hundreds of endemics), Bothrops snakes, Stenocercus lizards.
Best season: Apr–May, Oct–Nov (Andean bimodal rain triggers amphibians). For reptiles: Dec–Mar.
How it works: base at a cloud-forest reserve (Coffee Region, Sierra Nevada or Cordillera Oriental). Day and night outings, focus on streams and bromeliad zones. Pairs with birding.
What we do NOT do on a herp outing
Herpetology tourism is a field where bad practices leave an immediate footprint. Chytrid fungus can be transmitted by a single careless visit. These are the rules we apply without exception.
No handling of wildlife
We do not touch frogs (the lipid barrier of their skin is delicate and our sweat or repellent can damage it). We do not grab snakes for a better pose. We do not move lizards. The rule is: observe and photograph where it is, as it is. Anyone running herp tourism with handling is not doing science —they are doing harm.
Zero capture, zero collecting
No specimen collecting. Photo identification in the field, nothing more. The outing ends with everything left where it was.
Boots disinfected between sites
Batrachochytrium dendrobatidis (chytrid fungus) has wiped out dozens of Atelopus species in Colombia. It is transmitted via boot soles. Before moving from one reserve to another we disinfect footwear with 70% alcohol or 10% diluted bleach.
No direct flash, no prolonged white light
Nocturnal frogs and snakes are extremely sensitive to white light. We use a red LED headlamp; if flash is needed, always with a diffuser and at minimum power. Never more than 2–3 frames per individual.
No DEET on hands during observation
DEET is highly toxic to amphibians. Apply on clothing only, keep hands clean during observation and photography. Wash hands before any macro session with an amphibian.
No reliance on call playback
Broadcasting calls to attract frogs or snakes is disruptive. Permitted only in research under permit. We do not use it on tourist outings.
When to go: amphibians vs reptiles
The herp calendar runs opposite to the mammal calendar. Amphibians need water and humidity to breed and call; reptiles thermoregulate better in dry heat. This matters for planning.
| Region / month | Amphibians | Reptiles | Recommendation |
|---|---|---|---|
| Choco / Apr–Jun | High activity | Medium | Frog photo tour plus macro |
| Choco / Oct–Nov | Calling peak | Medium | Night outings with bioacoustic recording |
| Amazon / May–Jul | High (high water) | Medium | Best for canopy plus tree frogs |
| Amazon / Dec–Feb | Medium | High | Low water, best for turtles, caiman, terrestrial anaconda |
| Llanos / Dec–Mar | Low | High (concentrated) | Best for anaconda, Orinoco crocodile, spectacled caiman |
| Llanos / Jun–Aug | High (flooding) | Medium | Difficult access; we do not operate at the flood peak |
| Andes / Apr–May, Oct–Nov | Peak (bimodal rain) | Medium | Best for Atelopus and Pristimantis |
| Andes / Dec–Mar, Jul–Aug | Medium | Medium | Best for diurnal trail snakes |
Anaconda in Casanare
Frank documents a green anaconda sighting in flooded savannah of Casanare during the dry season, with field commentary on behavior.
What to bring on a night herp outing
A night outing in humid forest or savannah is a different animal. Minimum specific gear:
| Category | Items |
|---|---|
| Lighting | Handheld LED flashlight plus red-filter headlamp. Backup batteries (humidity drains them). |
| Footwear | Tall rubber boots or boots with gaiters. Non-slip soles. Thick quick-dry socks. |
| Clothing | Long pants (ankle-bite protection). Long-sleeve shirt. Hat or cap with peripheral vision. Sweater or waterproof shell for night chill (paramo). |
| Repellent | On clothing only, never on hands. DEET 30%+ or picaridin. Clean hands before any handling. |
| Photo | 100mm macro plus diffused flash. Red headlamp for focus. Dry bag for the camera. |
| Safety | Walking stick (detection), leather gloves (we do not handle, but just in case), know the location of the nearest health center for antivenom. |
| Documentation | Regional herpetology guide (PDF on phone is fine), field notebook, GPS or phone with coordinates. |
Note: in zones with rattlesnake or fer-de-lance, the night walk is higher risk. We move in groups of 3–5 with the guide leading with a stick, spaced 2–3 m apart. Snake-bite probability on an outing with an experienced guide is virtually zero, but the protocol is followed.
FAQs about Colombia herpetology tours
What is the real probability of seeing a poison dart frog Colombia?
In the Phyllobates terribilis operating zone (a specific Choco area), roughly 70–90% during the rainy season with two outings. The frog is diurnal and frequent near streams. The species is endemic to an area of about 2,500 km², all within the Colombian Choco.
And the green anaconda in the Llanos?
High probability in the dry season (Sept–Mar) on specific Casanare ranches with a biologist: 60–80% over a 4–5-day stay. The anaconda is semi-aquatic and frequent in remaining waterholes and morichal palm wetlands. In the rainy season (Apr–Jul) it disperses and probability falls to 10–20%.
Are night herp outings dangerous?
Low risk with an experienced guide. Venomous snakes (rattlesnake, fer-de-lance, mapana) are present but human behavior keeps them at bay. In years of operation we have not had a single serious incident. Tall boots, guide leading with a stick, spacing, and never clearing brush with bare hands.
Is the golden frog really toxic to the touch?
Yes. In its natural environment it accumulates batrachotoxin from ants and mites. Contact with intact skin is not lethal, but through mucous membranes or broken skin it is highly dangerous. In captivity without the specific diet it loses toxicity. Rule of thumb: we do not touch any amphibian, golden frog or harmless rainfrog —for them and for us.
What if we find a harlequin frog (Atelopus)?
It is a privileged event. The Atelopus genus has lost entire species to chytrid fungus. If we find one, we photograph at distance, log coordinates, do not handle it, and report to researchers via citizen-science platforms (iNaturalist) if taxonomically relevant. It is one of the few cases where tourism contributes directly to science.
Do you run herp tours for professional photographers?
Yes. We work with two professional herpetologists in the Choco and one in the Amazon who combine scientific rigor with macro-gear fluency. Outings of 5–10 days, group max 4 photographers to keep hide quality high. Custom-built on request.
Is wildlife photography legal in Colombia?
Yes. Observation and photography do not require a permit. Scientific collection does require ANLA authorization (National Environmental Licensing Authority). Trade in wild species (including possession) is illegal and severely penalized. As a tourist you only observe and photograph —that is free.
What if I need to photograph for a documentary or commercial publication?
Commercial work needs site-specific permits (National Parks, Indigenous communities, private landowners). We process these 2–3 months in advance. For BBC, NatGeo, Discovery Channel and similar, we have coordinated full crews with permits in the Choco and the Amazon.
Plan your Colombia herp expedition
Tell us what you want to see and how long you have. We come back with a custom proposal in 48–72 hours, no commitment.
Frequently Asked Questions
How many amphibian species does Colombia have?
Colombia has over 850 amphibian species, ranking among the top three countries globally. This includes more than 270 species of poison dart frogs, glass frogs, tree frogs, and salamanders, with new species discovered regularly in remote cloud forests.
Where can you see poison dart frogs in Colombia?
The best locations for poison dart frogs are the Chocó rainforest on the Pacific coast, the cloud forests of the Western and Central Andes, and lowland forests in Putumayo. The golden poison frog — the most toxic vertebrate on Earth — is endemic to the Chocó.
Are there crocodiles in Colombia?
Yes, Colombia has two crocodilian species: the American crocodile found in Caribbean coastal areas and rivers, and the critically endangered Orinoco crocodile in the Llanos. Spectacled caimans are also abundant, particularly visible during dry-season Llanos safaris.
What is the best time to see amphibians in Colombia?
The rainy season (April-November in most regions) is best for amphibian observation, as frogs and salamanders are most active during wet conditions. Nighttime guided walks in cloud forests and rainforests yield the highest diversity of species.