The Dumeril's boa is from the southwestern corner of the island. They live in the dry forests there, and use their remarkable camouflage to blend in and remain unseen. Big females may approach 7 feet in length.

dum full by bwboone, on Flickr

dum by bwboone, on Flickr
The Ground boa is from the northeastern corner of the island. Their general habitat requirements are similar, but the forests they live in are much more humid. The Ground boa is the larger of the two species, approaching 9 or sometimes even 10 feet in length.

acamadcamo by bwboone, on Flickr
To me, Acrantophis eyes are fascinating. Even these are camouflaged on the snakes! I think the way they are divided in color is amazing.

acamadhead by bwboone, on Flickr

dum head by bwboone, on Flickr
Even though the two species look superficially alike to the casual observer, upon closer examination there are some telltale differences. Ground boas have large scales that cover the tops of their heads, and their patterns are a lot less sharp. The edges of the various colors are almost blurred, and they have a more geometric look to them.

acamadpattern by bwboone, on Flickr
Dumeril's boas have small scales that cover the tops of their heads, and their pattern is much more sharp edged, but more randomly shaped. Dumeril's boas also have an unusual white blotch on their throat, that shows up against an otherwise pale yellow ground color.
Dumeril's boas are by far the more commonly seen of the two species in captive collections. Part of the reason for this is they seem to be pretty easy (and willing) to breed in captivity. Another reason is when the young Dumeril's are born (live, like most other boas), they are small but there are bunches of them. When Ground boas are born, they are considerably larger and there are generally just two or three in a litter.

dumerils by bwboone, on Flickr

acamad1 by bwboone, on Flickr
Thanks for looking. I hope you have enjoyed looking at, and maybe learning a little about these unique snakes.