This question is exactly like asking, “Why are poodles bigger than dogs?” Poodles ARE dogs. They are bigger than some, but smaller than others. Iguanas ARE lizards. They are bigger than some, but smaller than others. They are the size that they are because of evolutionary pressures. read more
If the iguana is to live in a household with people that fall into any of the aforementioned groups, a reptile may not be the right pet for your family. Housing Iguanas. Iguanas can grow to be up to seven feet long when their tail is included in the measurement and they will weigh about 20 pounds (much larger than most people think an iguana gets). read more
All iguanas are lizards, but not all lizards are iguanas. Iguanas are a subgroup of lizards. Just as geckos, skinks, monitors, and chameleons (or whatever group contains chameleons and anoles) are all subgroups of lizards. read more
Yes, iguanas are lizards. They’re also some of the largest lizards in the Americas and one of the most common reptile pets. read more
This isn't the case for all reptiles. Lizards, for example, are male biased in sexual size dimorphism, and so are crocodilians. Snakes and turtles are female biased though. read more