how to tell from a male or female iguanas?

i just got an iguana but how can i tell the sex ??
Answers:
if you flip your iguana over on its back and look between the legs there are lines of femoral poreson the inner thighs if the spots are large its a male also males have 2 bulges at the cloaca females only have one bulge and faint femoral pores

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I have Two Iguana's and the best way to tell is take it to a vet. They have a flap of skin at the base of their tail behind the back legs that needs to be spread a part. For your safety and the Iguana's don't try this your self.

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Id listen to the lady above and take it to the vet.

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Male iguanas are usually a bright bluish green w/ a large pinkish purple dewlap ( A flap of skin below the chin). Females are green with a smaller green dewlap. If you can't tell, you may want to consider asking your vet to check.
+?+Marissa+?+

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you won't know the sex tel their like close to a year old. Males will be more colorful, big dewlap.bigger head and large jowls,they turn orange during mating season and aggressive,They also have femoral pores on inner thighs that stick out. Other then that wait until their older that will tell you.

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Male ig: on the inside of their thighs from about 2-3 years of age you can begin to tell. They have little dots called femoral pores. Males are waxy and stick out some.
Female ig: Her femoral pores will be smaller and not waxy.
The bulge thing? Doesnt work, I have both genders and my females got the same as the male when it comes to the bulge on her tail but the males is slightly bigger. I wouldnt risk it on bulges or dewlaps. Some igs are more devolped then others.

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That's a very good question. You can't. Not until they are over a year old and starting maturing. Usually males will be quite a bit larger and more colorful than females. Males also develop larger spikes along their back and have a bigger dewlap under their chin. They also like to do the head bobbing thing, which is used for mating, aggression, and communication. But then again, it has been known that some females can create these characteristics as well. The best way to tell is to wait till they are at least a year old and look under it's hind legs. On each leg there should be a row of spots about 8 to 10 long. These are called spores. females usually have smaller ones that sink into the skin while males have larger ones that stick out. These larger spores on the male help him grip onto the female when mating.

Owner of a 4year old, 6 foot long, male green iguana

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There is a few on here that is right, but to know exactly what to look for go to www.anapsid.org, to the sexing your iguana. This is the best research available to you for everything you need to know and care for your baby.