The Basilisk Lizard
Meet the Basilisk Lizard: The Reptile That Can Run on Water
The Basilisk Lizard, often called the Jesus Christ Lizard, is one of Costa Rica’s most fascinating reptiles. Known for its incredible ability to sprint across the surface of water, this agile creature amazes travelers on river walks and rainforest tours throughout the country.
You’ll often see basilisks perched on sunny branches near rivers, ponds, and forest edges. They are quick, alert, and have a habit of darting into the water the moment they sense movement. Watching one run across a stream on its hind legs is a sight visitors never forget.
Key Facts
Size: 60 to 75 cm (24 to 30 inches) including the tail
Weight: Around 200 grams (7 ounces)
Lifespan: 7 to 10 years in the wild
Diet: Insects, small fish, fruit, and occasionally small amphibians
Activity: Diurnal, most active in the morning and late afternoon
Interesting Facts About Basilisks
The Basilisk gets its nickname “Jesus Christ Lizard” because of its ability to run on water. It uses special fringes of skin on its hind toes that spread out and create small air pockets, allowing it to stay above the surface for short distances. This helps it escape predators like birds and snakes.
Males have a large crest on their head and back that makes them easy to recognize. These crests are used to attract females and intimidate rivals. Females are smaller and less colorful, often blending in perfectly with the forest floor.
Basilisks are strong swimmers and can stay underwater for up to 30 minutes. When threatened, they’ll dive beneath the surface and remain completely still until the danger passes.
They are cold-blooded and rely on the sun to regulate their temperature. You’ll often see them basking on rocks or branches near rivers, perfectly still except for an occasional flick of the head or tail.
Habitat and Behavior
Basilisks live in tropical rainforests, lowland jungles, and riverbanks across Costa Rica. They are most common along the Pacific and Caribbean slopes and are frequently seen near streams in national parks and gardens.
They are territorial and active during the day. Juveniles are especially playful, often chasing insects or practicing their running skills on puddles and shallow water. Adults feed on a mix of insects, small vertebrates, and fruits, making them omnivorous and well adapted to forest life.
Because they are so unique and visible, they are a favorite for families and photographers on wildlife tours.
Where to See Basilisk Lizards in Costa Rica
Basilisks can be spotted in many parts of the country, especially near rivers and forested wetlands. Some of the best places to see them include:
Tortuguero: Jungle Canal Wildlife Tour, where guides often spot basilisks sunning on branches above the water during boat rides
La Fortuna: River and Rainforest Walk, a great outdoor adventure at night that offers close-up views of reptiles, frogs, and tropical birds
Rio Tarcoles: Crocodile River Safari, where visitors can see basilisks running on the riverbanks alongside herons, iguanas, and crocodiles
Guided tours make it easy to learn about basilisk behavior and give you a chance to see their famous water-running ability in action. If we do not provide the tour ourselves, you will see we have included links to other tour operators that offer sightings. We have personally been on these tours ourselves and enjoyed them! :)
