You'll want to pop over to the site for this one - there's a little animation that goes with it.
I'm a Florida native and our anoles do the dewlap thing. I've always thought it was both creepy and badass, and felt kind of bad that humans don't have extendable neck flaps. Sette definitely wants one.
Two-toes have taken to hiding dissident tattoos on theirs. Or at least this trio has.