- Iguanas are eaten by a variety of carnivores, including humans! In South America, green iguanas are called gallina de palo, or "chicken of the tree."
- In the animal kingdom, males often have the brightest colours, but not among green iguanas. The males are dull green with an orange chest while the females are brighter coloured.
- Male iguanas go through elaborate courtship behaviours of head bobbing and erecting the spines along their backs.
- Green iguanas and other herbivorous lizards can conserve water by excreting excess salt from the blood stream through a nasal 'salt gland'.
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