Sometimes, there are no answers for these questions. I'm sure that you accidentally read Iguana as what we call it, then the scientific name and thought it was all one, or there could have been a typing error in the thing you read (or I guess if you heard it, there could have been an error in speech). If these aren't good enough answers, then you might as well be asking me why ANYTHING exists...
exactly kinda ...basically most animals scientific names are based on family and genus
a green iguana's family is iguanidae, and the genus is iguana so it would be iguanidae iguana which would be simplified as iguana iguana.
Iguana is a genus of herbivorous lizards native to Central America. There are two species of iguana, Iguana delicatessima (Lesser Antillean Iguana), and Iguana iguana (Green Iguana). There are several similar genera that are commonly referred to as iguanas.
The "true" iguanas are the genus Iguana, such as the green iguana (Iguana iguana). However, the name is applied to other genera of lizards, such as the desert iguana (Dipsosaurus dorsalis).
Baby iguanas don't have a special name for them. However, since they hatch from eggs, you could call them "hatchlings".
The scientific or taxonomic name would be Iguana iguana.
Iggy!!!!!!!!!!!!!!! Hannah the Iguana!!!
the answer is that the scientific name for the iguana is the same its always going to be an iguana because its the same animal witch its a reptile.
Baby iguanas don't have a special name for them. However, since they hatch from eggs, you could call them "hatchlings".
The common name is the 'Green Iguana' probably the most common/famous iguana
Cyclura cornuta
Amblyrhynchus cristatus
Ctenosaura similis
It's name means "iguana tooth" because it's teeth were like an iguana's. Iguanas eat plants so it's reasonable that Iguanadon was also a herbivore.