Yes the first pic is a common boa.
Common boas are BCI = Boa Constrictor Imperator
This is what most pet stores sell as "Red - Tail Boas".
However they are not true red-tails.
For the pet stores it sounds better to call a Boa Constrictor a
Red - Tail Boa rather than by it's real name.
Some people freak out if they here the word constrictor.
I don't know why they just do. LOL
Hi Bryce Masuk,
Common boas are not "true red tails" they are BCI = Boa Constrictor Imperator.
True red - tails are BCC = Boa Constrictor Constrictor.
Some of them are Peruvian, Suriname & Guyana.
Here is a picture of one of my True red - tail. BCC Guyana.
Here is a good link to see more BCC.