Red Tail Boas are classified as follows:
Boa Constrictor Constrictor (BCC)- These are the "true red tails." These are generally the largest in size and maintain their red tails into adulthood. The tail will normally have a distinct red color that ranges from bright red to a deeper, more blood red color. They come from:
Peru
Brazil
Venezuela
Suriname
Guyana
Boa Constrictor Imperator (BCI)- This is the largest group of boa constrictors. Their tail color normally ranges from a darker, more subdued red to a more common brown color. They include the boas from Central America:
Colombia
Panama
Costa Rica
Nicaraqua
Mexico: Tamaulipas, Tarahumara
and the insular islands:
Hogg Island
Caulker Cay
Crawl Cay
Corn Island
Boa Constrictor Amarali (BCA)- Bolivian boa constrictors
Boa Constrictor Longicauda (BCL)- These come from the Tumbes region of Peru. They are also known as the Peruvian Long-tail Boa, as they have a higher scale count from their vent to tail tip, than the Peruvian BCC.
Boa Constrictor Occidentalis (BCO)- Argentine boa constrictors.
Boa Constrictor Sabogae (BCS)- Pearl Island boa constrictors
As well as, some of the lesser known sub-species:
Boa Constrictor Nebulosa- Dominican Republic, Lesser Antilles
Boa Constrictor Orophias- St. Lucia
Boa Constrictor Melanogaster- Ecuador Black Belly
-Vypyrz-