Reptiles

Green iguana

Iguana iguana

A large green iguana with a spiny crest along its back and a hanging throat flap, lying along a tree branch

Photo: Hans Hillewaert · CC BY-SA 4.0 · via Wikimedia Commons

Where
Estuaries, Dry forest, Your garden
When
Daytime, all year, basking in tree tops
Size
Up to about 1.5 to 2 metres including tail
Should I worry
Enjoy it
Harmless if left alone. A cornered adult bites and thrashes, so leave it alone.

Where the garrobo owns the rocks, the green iguana owns the trees, especially any tree that overhangs water. Look up along a river or an estuary and count the long green shapes draped along the branches.

Where you’ll see it

Riverbanks, estuaries, mangroves and the wetter, greener patches of the coast, more around Tamarindo and Playa Grande than in dry Coco, though they turn up in gardens with big trees. They drop into water to escape and swim well.

What to know

Big, calm and almost entirely herbivorous as adults. The dewlap under the chin and the spiny crest down the back are the identifiers, along with the sheer length. Breeding males go orange and get bold about it.

Locally they have the old nickname gallina de palo, chicken of the tree, because they used to be eaten. They are protected now. Leave them alone and they will lie in the sun and ignore you, which is the whole arrangement.

Questions people ask about this one

How do I tell a green iguana from a garrobo?

Green iguanas are greener, longer, and have a large round scale below the ear and a big hanging throat flap. Garrobos are grey and black with a spiny banded tail and a smaller head. Green iguanas favour trees near water, garrobos favour rocks and ground.

Why is that iguana orange?

Adult males turn shades of orange in the breeding season, roughly the dry months, to impress females and warn off rivals. It is temporary and it is normal.

Wondering what else is out there?

Ask me on the call. I'll tell you what actually shows up in a Coco garden, what to do about it, and the one guy everyone rings when there's a boa in the roof.

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