I'm fascinated by lizards. 
They are definitely interesting! There are over 6000 species of lizards.
I wonder if they're broken down into sub-species. 
I'm sure they are. Especially with all the different kinds of lizards. Some have 4 legs, some have none and have snake-like bodies.
I know a lot of them are green, or brown, but there are probably other colors as well.
For sure. They have a lot of different adaptations. Some even have camouflage.
Are any of them carnivores, do you think?
Yes! Most of them are and are sit-and-wait predators. Most eat small insects but the Komodo can eat things as big as a water buffalo.
How big is the Komodo that it can eat a water buffalo?
Komodo dragon
The Komodo dragon ("Varanus komodoensis"), also known as the Komodo monitor, is a species of lizard found in the Indonesian islands of Komodo, Rinca, Flores, and Gili Motang. A member of the monitor lizard family Varanidae, it is the largest living species of lizard, growing to a maximum length of in rare cases and weighing up to approximately .
Its unusually large size has been attributed to island gigantism, since no other carnivorous animals fill the niche on the islands where it lives
Skink
Skinks are lizards belonging to the family Scincidae and the infraorder Scincomorpha. With more than 1,500 described species, the Scincidae are one of the most diverse families of lizards. Common skinks include many different kinds such as the slender skink, snake-eyed skink and the skinks of Plestiodon are among the common skinks.
Description.
Skinks look like true lizards, but most species have no pronounced neck, and their legs are relatively small; several genera (e.g., "Typhlosaurus") have no limbs at all