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5 Weirdest Animals in the Amazon Rainforest
A rainforest is a tough place for animals to survive — after all, it’s home to giant predators, venomous insects and frogs, dangerous waters, and poisonous plants. In order to live in such a place, animals have evolved in all kinds of strange ways. Here, we’ll explore the five weirdest animals in the Amazon rainforest, and look at why their unique adaptions work perfectly for them! All five, of course, live in the rainforests around our Tambopata lodges in Peru.
1. Candiru Fish
The frightening legend of the Candiru fish has traveled far and wide, appearing in tabloids and newspapers from time to time all over the world. Rumors had swirled around for years about the small Amazon fish attacking local people’s genitalia, drawn by the smell of urine.
Then in the only documented modern case in 1997, a Brazilian man and a local doctor claimed that a Candiru fish had jumped out of the water and swum up his urethra! Later, researchers largely disproved these claims, noting that Candirus are unable to jump out of water or swim up to such a small opening, along with many other inconsistencies. So is there any truth to these wild stories? The Candiru isn’t actually drawn to urine, so Amazon, ahem, urinators don’t need to be worried. Scientists are still getting to the bottom of this strange jungle fish.
Learn more about the Candiru Fish on our animal page here!
2. Potoo Bird
On moonlight nights, you may hear the cry of “po-TOO, po-TOO” coming from deep in the jungle. These haunting sounds (listen to them here) come, of course, from the Potoo bird. There are several species of Potoo birds in the Amazon Rainforest. If you go looking for one, however, they’re incredibly hard to find without an experienced guide — their feathers match tree bark almost perfectly!
The birds are nocturnal, waking at dusk to hunt moths and other insects. They have huge eyes — perfect for spotting flying bugs — and giant, gaping mouths to catch them. This, along with their weird calls, makes the Potoo bird a truly otherworldly, strange bird.
Learn more about the potoo bird on our animal page!
3. Tarantula
You knew this one was coming, didn’t you? But while Tarantulas look undoubtedly creepy due to their huge size and furry legs, their appearance isn’t the weirdest thing about them! In fact, I include the family of large spiders here for their odd behavior.
The Peruvian Chicken Spider, a type of Tarantula, is a common sighting in the Tambopata jungle. Photo by Jeff Cremer.
Tarantulas have decidedly interesting habits, especially when it comes to mating. Male Tarantulas spin a flat silk web on the ground, then rub against it to release semen. Then, he absorbs the liquid into his pedipalps, short leg-like limbs, to store it. Later, he finds a receptive female and inserts it into an opening into her abdomen. As soon as he’s done, the Tarantula flees so that the aggressive female doesn’t attack or try to eat him! Quite a spider romance.
Learn more about the Tarantula on our animal page here!
4. Hoatzin
If you catch a glimpse of a Hoatzin perched near an oxbow lake in the Amazon, you might wonder what you just saw. Was that a wild turkey? A dinosaur? A Precolumbian god? What the heck was that, and why did it smell that way? The stinky, beautiful Hoatzin is without a doubt one of the rainforest’s most interesting creatures.
A Hoatzin near the Tres Chimbadas oxbow lake, just upriver from the Posada Amazonas lodge.
The colorful Hoatzin eats leaves, which make it smell a bit like an Iowa farm — like lovely hay, or stinky manure, depending on your nose. They’re awkward, ungainly birds, clomping around lakeside trees — from their movement to their diet, they don’t have much in common with other bird species. In fact, the Hoatzin does look a bit like a dinosaur, and many scientists see it as clear proof of the evolutionary connection between reptiles and birds.
Learn more about the Hoatzin on our animal page here!
5. Piranha
Even folks with little knowledge of Amazon wildlife know (or think they know) all about the Piranha — the villain of the rainforest, right? But the scientists who study the fish work hard to separate fact from fiction. The reality of the fish is even more fascinating than its Hollywood “bad boy” image.
During our Oxbow Lake Visit, guests get the chance to fish for Piranhas. Piranha photo by Merin McDivitt.
Piranhas are pretty small, but their infamous teeth are indeed impressive. They actually resemble the tooth enamel of sharks’ teeth, and the largest types can bite with 72 pounds of force! As for their diet, the toothy fish mainly chomp down on other fish, seeds and bugs, and sometimes other Piranhas. Occasionally, they might nibble on a mammal, but this usually happens when the larger creature is already dead or dying.
Learn more about the Piranha on our animal page here!
So there you have it, and hopefully, you know a bit more about the jungle’s weirdest creatures.
By Merin McDivitt
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Such a wonderful experience deep in a part of the Amazon, Tambopata NP. They really involve you with what is happening at the research centre with evening lectures. The meals are outstanding and the rooms are comfortable and I had the best sleep. Dino our guide was outstanding. The river trip to see the Macaw claylicks was a beautiful outing. We saw Capybaras along the river and it was very scenic. The staff are friendly and very engaging. As a tour operator who sends clients to AFRICA for safari, I was hugely satisfied. Thank you, gracious. Food & drinks: Good was simply delicious Read all


An amazing experience in the Peruvian jungle. the information about the centre was very accurate so I knew what to expect but was blown away by the experience and competence of my guide for the four nights, Juan Carlos Yatto. JC was looking for birds for me from the moment he collected me at the airport, so we saw birds on the drive and on the boat ride as well as on the excursions themselves. I was in Peru three weeks and JC was my best guide by far. Don't miss the clay licks for sure, and the tower is also well worth the climb. Food and people are wonderful and the research very interesting. Read all


Das Tambopata Research Center ist eine wunderbare Lodge im Nationalpark Tambopata. Die charmanten, miteinander verbundenen Aufenthaltsräume und Zimmer befinden sich auf hölzernen Stelzen. Bei den offenen Gemeinschaftsräumen gibt es gemütliche Sitzecken, eine wunderbare Hängemattenrelaxzone und einen herrlichen Restaurantbereich, wo zu jeder Zeit Tee, Kaffee und Wasser zur Verfügung stehen. Die stilvollen Zimmer verfügen über bequeme Betten mit Moskitonetz und moderne, saubere Duschbereiche. Die Research Center Lodge mit den Forschungseinrichtungen liegt inmitten des Regenwaldes umgeben von der reinen Natur mit der fantastischen Flora und Fauna, welche dort auch weiterhin erforscht und geschützt wird. Jeden Abend gibt es dazu sehr interessante Vorträge. Die Mitarbeiter sind sehr freundlich, offen und zuvorkommend. Die Buffets waren sehr köstlich und reichhaltig mit Gerichten aus der Region. Es wird großer Wert auf ökologische und nachhaltig umweltschonende Bewirtschaftung gelegt. Von der Lodge aus ist es möglich, mit ausgebildeten Guides in Gruppen von maximal 6 Personen verschiedene Exkursionen zu machen. Speziell Timo war ausgesprochen freundlich, auf unsere Sicherheit bedacht, ging auf die individuellen Interessen der einzelnen Personen ein und vermittelte uns in seiner kompetenten Art umfangreiches Wissen über die Pflanzen- und Tierwelt. Er hatte dabei die wunderbare Fähigkeit, versteckte Wildtiere zu entdecken, und verschaffte uns wunderschöne Momente, auch durch das mitgetragene Teleskop, wodurch wir der Tierwelt näher sein konnten. So sahen wir u.a. Brüllaffen, Kapuzineraffen und Spideraffen mit ihren Kindern, viele Vögel insbesondere Papageien wie z.B. Scharlach- und Gelbbauch-Aras sowie Wasserschweine und verschiedene Insekten. Wir können diese wunderbare Lodge absolut weiterempfehlen. Die herrliche Tier- und Pflanzenwelt in dem wunderbar erhaltenen und geschützten Regenwald des Amazonas war auf unserer Peru-Reise ein wirklich fantastisches Erlebnis! Read all


Rainforest Expeditions is a wonderful company and the Posadas Amazonas lodge is a beautiful location to spend your time in the Amazon. The staff are all incredibly kind, helpful, and knowledgeable. The tours were very fun and we saw lots of animals including River otters, monkeys, birds, and capybaras. We loved our guide Luis and all the people we met. The food was delicious and locally grown and there was never a dull moment. Would highly recommend! Read all


I went to Posada as part of a wider group trip, so did not pay for it directly. The lodge feels very far from anywhere and yet it feels incredibly safe. The rooms are open to nature, but nothing was ever damaged (use the safe boxes as advised, especially for food - not that you'll need any - the catering is excellent, with plenty of vegetarian options, and snacks are also provided between meals). There are flushing toilets, incredible shower facilities and the beds are very comfortable with mosquito nets placed at night by the staff. Drinking water vats are strategicvally placed throughout the lodge but you may have a long-ish walk to the common areas through corridors. Some parts of the corridors are open to the elements, but umbrellas are provided everywhere in case of rain. There is obviously no air conditioning, but this helps you acclimatise. The lodge is run by a family and others from the Infierno community, which gives the place a homely feel, with resident tour guides and a local geologist for citizen science projects. Massage services are available and there is a local shop for souvenirs and essentials like bug spray, clothing and torches. Tons of activities can be arranged, but it's also nice to relax in the hammocks and common areas and listen to the sounds of nature. While this hotel is not going to be for everyone, I had the most incredible time! Read all


The place to go if you want to see Macaws in the Peruvian rainforest. We stayed at the Tambopata Reaearch Centre (TRC) for three days and had Juan Carlos Yatto as our guide for the duration of our stay. We loved the mission of the TRC ie Macaw conservation and the link between Macaw nest site availability and the overall health of the rainforest. Juan Carlos Yatto (there is another JC at the research centre) was a fantastic guide and really made a difference to our experience at the TRC. His knowledge of the different species of wildlife and plants was amazing, his ability to spot things in the day or at night was phenomenal and he really made things accessible for our group. His English is excellent (including great humour when appropriate) and is a super guy. I really do recommend the TRC abd Juan Carlos Yatto as a guide. We saw an abundance of wildlife of all descriptions thanks to him and learned a huge amount without being overloaded. Read all


Two planes, a bus and a boat…that’s how we made it to TRC, and every minute was worth it. Tambopata is a jewel, from the moment you are greeted by the guide assigned to you (Juan Carlos Gonzales for us) to the last boat ride back to civilization. Juan Carlos was amazing…on just one hike he found five of the seven species of monkeys in the area! He is truly an expert..can hear, see and even SMELL animals, birds and insects to point out to us. We upgraded to a deluxe suite and it was decadent! An elegant outdoor tub and shower on a private balcony was soo nice’ Although we went in the rainy season, it never rained while on a hike or excursion. It rained for a few minutes on our late afternoon cruise , but not enough to dampen our enthusiasm, or prevent us from seeing a capybara in the mid! (And despite the warning of a lot of mosquitoes, I have been bitten more in my own back yard!) The bar is great, there’s PLENTY of food…we are going home feeling so lucky to have had such a great connection to the beauty of the Amazon. Read all


We had a fantastic time for our 3N/4D stay at Tambopata Research Center. The whole experience was marvellous. Rooms and facilities were great and meals superb. The Staff, ably led by Tanya the manager, were all friendly and helpful. This is the only lodge actually inside the Tambopata National Park, and we enjoyed being so "remote". I like that you have one guide who coordinates and takes you on all your activities; Jair our guide was amazing. One morning our planned activity was rained out, and I liked that they have alternative "wet weather" activities planned. There are lectures each night by researchers, which were very interesting. Also citizen science projects that you can participate in. All up, it was a fantastic way to experience the Peruvian Amazon. Read all


Posada Amazonas by Rainforest Expeditions is an extraordinary place. From your arrival at the airport in Puerto Maldonado all the staff is always attentive to your needs. You travel by boat to the hotel Posada Amazonas and it is a unique experience. It really is a total disconnection and a recollection with Mother Nature 🌎 The buffet lunch is delicious (already included in the price). You have a guide who speaks Spanish and English at all times and accompanies you to explore the jungle, the river and other activities. The price is worth it. Outside my room I caught a glimpse of monkeys :) The night sky is starry and very spectacular ✨️ 5 star service. I will definitely come back. Read all


I stayed with my parents at Refugio Amazonas for 3 days. We really enjoyed our stay and had a wonderful time here. The staff were extremely kind and well informed. The lodge manager- Arturo in particular was very helpful. To highlight their culture: They prepared special vegetarian meals for my parents, always ensured we felt comfortable and all our needs were met. A stay here is a must do to get a real feel of the Amazon rainforest on your trip to Peru! Noteworthy details: There are a lot of activities for kids and families to do, but my personal favourites are: Macaw Claylick, OxBow river ride, sunset cruise and the canopy tower. Read all


I can't express how amazing our guides were. Incredibly knowledgeable and able to spot birds, frogs, spiders, animals, etc. with an almost unbelievable ability. The research and contributions to the jungle they are making at the Center are to be commended. The facilities were nice and kept clean and the staff was great, but between the walls in the rooms being open to the jungle, the heat, the bugs, underpowered fans, having to completely cover up for hikes due to bugs and then getting overheated, etc. it made for a tough stay. The food was good but after a couple days became repetitive. I would recommend this for serious birders who are willing to endure a bit for an incredible adventure. Read all
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