Iguanas are one of the first animals most visitors photograph in Manuel Antonio, usually without meaning to — they sit on the beach rocks, on the restaurant railings and on the branches above the trail, and they do not move much. This guide covers which species you are looking at, where they turn up, how big they get and whether it is safe to be near them.

What kind of iguanas are in Manuel Antonio?

Two species: the green iguana (Iguana iguana) and the black spiny-tailed iguana (Ctenosaura similis), known locally as the garrobo.

The green iguana is the arboreal one — it lives in trees, usually over or near water, and adult males in breeding condition turn a strong orange rather than green, which confuses a lot of visitors. The black spiny-tailed iguana is the ground animal: grey-brown with dark bands, a tail ringed with spiny scales, and a habit of sunning on rocks, walls and open sand.

If you photograph an iguana on the beach or on a wall, it is almost always a ctenosaura. If it is draped along a branch above the trail, it is almost always a green iguana.

Where do you see them in the park?

Black spiny-tailed iguanas on the rocks and open sand at Playa Manuel Antonio and Playa Espadilla Sur, and around the picnic areas. Green iguanas overhead along the main trail and near the stream crossings.

The beach animals are the easy ones — they are habituated to people, they hold their position, and they are at eye level. The tree animals take more looking: a green iguana lying motionless along a horizontal branch reads as part of the branch until it moves. This is one of the sightings where a guide’s eye genuinely beats your own, and a spotting scope turns a shape into an animal.

What size should I expect?

Adult green iguanas commonly reach around 1.5 metres from nose to tail tip, with most of that length in the tail. Black spiny-tailed iguanas are usually shorter but heavier-bodied.

The size is the thing photographs never convey. A large male green iguana on a branch above the trail is a genuinely substantial animal, with a dewlap under the jaw and a crest of spines down the back. Visitors regularly walk under one without noticing it, then stop dead when a guide points it out.

Is it safe to get close?

Yes, with the same rule that applies to every animal in the park: do not feed them and do not try to touch them.

Iguanas are herbivores and have no interest in you. The risk is not aggression, it is habituation. An iguana that learns people carry food starts approaching people, and an animal that approaches people ends up injured, sick or removed. The spiny-tailed iguanas around the picnic areas are already further down that road than anyone would like — they come toward bags.

Keep your food closed and in a bag. The same discipline that protects the coatis and the monkeys protects the iguanas.

When are they most visible?

Mid-morning onward, once the sun is on the rocks and the branches — which is the opposite of most of the park’s wildlife.

Iguanas are ectotherms. They need to warm up before they are active, so the 7:00 a.m. opening hour that is best for birds and monkeys is the worst hour for a reptile on a cool rock. By 9:00 or 10:00 a.m. they are out and conspicuous, and they stay that way through the afternoon.

That is useful trip planning: a morning walk gets you the mammals and birds, and the iguanas are still there — easier, in fact — on the way back out. See the best time of day for wildlife in Manuel Antonio for the full hour-by-hour picture.

Do iguanas disappear in the rainy season?

They become harder to find on wet, overcast days, because there is nothing to bask on.

This is the clearest weather effect of any animal in the park. On a bright day, iguanas are unmissable. On a grey, rainy afternoon in the green season they sit tight in cover and the same rocks read empty. It is not that they left — it is that basking has no purpose without sun.

December mornings are usually dry, which makes them a good iguana window. The December booking guide covers what the month actually looks like, including the crowds and the ticket situation.

Will I definitely see an iguana?

Close to it on a sunny day, but no operator should promise you a specific animal.

Being straight about the odds: black spiny-tailed iguanas around the beach and picnic areas are among the most reliable sightings in Manuel Antonio — more reliable than sloths, and far more reliable than snakes. Green iguanas in the canopy are a step harder and depend on someone spotting them. On a bright day with a guide, both are likely. On a dark rainy day, neither is.

What else are you likely to see on the same walk?

Sloths, white-faced capuchin monkeys, howler monkeys, coatis, agoutis, toucans and blue morpho butterflies.

Manuel Antonio packs a lot of habitat into a small area — that is the reason a three-hour loop here produces more species than a longer walk in a bigger park. The iguanas are rarely the reason people come, and often one of the things they photograph most.

How do you tell a green iguana from a spiny-tailed iguana?

Look at the tail and where the animal is sitting.

The black spiny-tailed iguana has rings of raised, spiny scales down the tail and is usually on the ground or on rock. The green iguana has a smoother banded tail, a large round scale below the ear opening, and a pronounced dewlap on the throat of adult males — and it is usually up in vegetation. Colour is the least reliable field mark of the three, because breeding male green iguanas are orange, not green.

What does a guided tour cost, and what is included?

Four options, all with an ICT-certified naturalist guide and scope access:

  • $30 per person — group tour. Park entrance not included.
  • $65 per person — premium. Smaller group.
  • $69 per person — private. Your group only.
  • $100 per person — VIP. The full private experience.

Park entrance is paid separately to SINAC: $18.30 per adult, $5.65 per child. Book on the Manuel Antonio National Park classic group tour page, or message WhatsApp 8514-1361. The walks are led by Jason Solano Zamora, an ICT-certified naturalist guide.

Is the park open every day?

No — Manuel Antonio National Park closes on Tuesdays.

For the 2026-2027 high season the closed dates are December 1, 8, 15, 22 and 29, 2026, and January 5, 12, 19 and 26, 2027. Check your dates against that list before booking flights or hotels around a park day. First visit? Read the first-timer’s guide to Manuel Antonio National Park.