Wetland Animals

Lithobates catesbeianus

The American bullfrog is the largest true frog native to North America, named for its deep, resonant call that resembles a bull's bellow. Highly adaptable and voracious, it will eat almost any animal small enough to fit in its mouth, from insects to other frogs, and has become one of the world's most widely introduced invasive amphibians outside its native range.

Ambystoma mexicanum

The axolotl is a remarkable salamander from a single lake system in Mexico that never fully undergoes metamorphosis, instead retaining its larval, gilled form and living its entire life underwater. This permanent juvenile state, called neoteny, along with its extraordinary ability to regrow lost limbs, organs, and even parts of its brain, has made it one of the most studied animals in modern regenerative biology research.

Haliaeetus leucocephalus

The bald eagle is a large bird of prey and the national bird of the United States, typically found near large bodies of open water with an abundant fish supply, from Alaska and Canada down through the contiguous United States. The species was once endangered in the U.S. due to hunting, habitat loss, and the pesticide DDT, which thinned its eggshells and caused widespread breeding failures; after DDT was banned and decades of conservation effort, bald eagle populations recovered enough for the species to be removed from the U.S. endangered species list in 2007.

Cacajao calvus

The bald uakari is a small Amazonian monkey best known for its strikingly bare, bright red face, found in seasonally-flooded forests along the Amazon and its tributaries.

Basiliscus basiliscus

The basilisk lizard, nicknamed the 'Jesus Christ lizard,' is famous for its remarkable ability to run upright across the surface of water for short distances without sinking. Native to the rainforests of Central and northern South America, it relies on this unusual skill primarily to escape predators.

Panthera tigris tigris

The Bengal tiger is the most numerous tiger subspecies, with India alone holding the large majority of the world's wild tiger population, and it is the largest wild cat native to Asia's forests, mangroves, and grasslands. Smaller populations also survive in Bangladesh, Nepal, and Bhutan, including in the Sundarbans, a vast mangrove delta shared by India and Bangladesh where tigers are unusually strong swimmers and sometimes hunt aquatic prey. India launched Project Tiger in 1973 to protect the subspecies through a network of dedicated reserves, and the country's wild tiger population has grown substantially since, even as poaching for the illegal wildlife trade and habitat fragmentation remain serious ongoing threats.

Photinus pyralis

The firefly is a soft-bodied beetle famous for its ability to produce light through a chemical reaction in its abdomen, a phenomenon called bioluminescence used mainly to attract mates on warm summer evenings. Despite the name, it isn't a fly at all -- it's a beetle, most closely related to click beetles and other Coleoptera.

Phoenicopterus roseus

The greater flamingo is the largest and most widespread flamingo species, found wading in large flocks through shallow saline lakes and lagoons.

Eunectes murinus

The green anaconda is the heaviest snake species in the world, a massive non-venomous constrictor found in the swamps, rivers, and flooded grasslands of South America. Unlike many large snakes, it spends much of its time submerged in water, where its bulk is supported and it can ambush prey coming to drink.

Iguana iguana

The green iguana is a large arboreal lizard native to Central and South America, often found basking on branches overhanging rivers and streams.

Hippopotamus amphibius

The hippopotamus is one of the largest land mammals, spending most of the day submerged in African rivers and lakes to keep its huge body cool.

Panthera onca

The jaguar is the largest big cat in the Americas and the only living member of the genus Panthera found in the New World, prowling the rainforests of Central and South America.

Crocodylus niloticus

The Nile crocodile is Africa's largest crocodilian and one of the continent's most feared apex predators, ambushing prey at the water's edge across rivers, lakes, and wetlands.

Pygocentrus nattereri

The red-bellied piranha is one of the most notorious freshwater fish in the world, native to rivers and floodplains across the Amazon and Orinoco basins in South America. Despite its fearsome reputation, it is primarily a scavenger and opportunistic feeder, and unprovoked attacks on humans are extremely rare.

Ambystoma tigrinum

The tiger salamander is one of the largest land-dwelling salamanders in North America, named for the yellow or olive blotches and stripes marking its dark body. Most of its life is spent hidden underground in burrows, either ones it digs itself or ones abandoned by other animals, only emerging at night or during its brief breeding season.

Pristella maxillaris

The X-ray tetra is a small freshwater fish native to slow-moving rivers and streams in South America, named for its almost completely transparent body that reveals its skeleton and internal organs. Its see-through appearance has made it one of the most recognizable and popular small fish in the freshwater aquarium hobby worldwide.

Danio rerio

The zebra danio is a small freshwater fish native to streams and rice paddies across South Asia, named for the five uniform, horizontal blue stripes running along its silvery body. Beyond its popularity as an aquarium fish, it has become one of the most important model organisms in modern biological and medical research.