What are some of the differences between male and female tegus?

[demetri]

I'm more wondering for red and blue tegus but any general differences work too!

 

[Waters]

The biggest difference is size. The males get much larger and bulkier, with large jowls.

 

[Walter1]

My understanding is that both sexes of blues are generally smaller and male jowls aren't well-developed. But the male is still longer than the female.