Lilith is right, it's *not* a skink, it's an iguana (
Iguana iguana). A medium (and yes, I do mean a medium) sized male, in full breeding colors.
Lilith, he was probably waiting around to latch on to you and have his way. Of course, I can understand the attraction.
If, by the time you read this, he's still around, please don't feed him romaine. Yes, iguanas are vegetarians, but a far better food for them is collard greens; other things that are good for iguanas are turnip greens, if you can get them, dandelion greens (yes, the ones you can collect them from your yard, if you avoid pesticides and herbicides). Avoid spinach, broccoli, kale-these are goiterogenic. I could actually talk your ear off about how to care for the iguana, this is what I do IRL. PM me if you want more info.
And yes, the other photo you provided was of a skink-there are numerous species of skink, distributed around the world. The pictured one is specifically, a juvenile five-lined skink. BTW, most of the skinks don't have throat fans or dewlaps-the ones that do and are commonly to florida are anoles.
This
concludes
today's
biology
lesson.