Talk about having to dig through the haystack to find the needle!
Found this little piece of info specifically on these guys. Here's the quote from the online pdf file:
"Pareas carinatus Wagler, 1830: Keeled slug snake / Ran
ho may go
Distribution. Nguyen & Ho (1996) and Nguyen et al.
(2005) mention records of P. carinatus (listed in Nguyen
& Ho, l. c. in the genus Dipsas) from northern, central
and southern Vietnam. Our fi ndings represent the fi rst
record for the Phong Nha - Ke Bang National Park as
well as for the Quang Binh province.
Natural history notes. We found two adult male
specimens: ZFMK 82890 (SVL 365, TaL 123 mm),
collected on 5 July 2004; VNUH 15.6.’05-1 (SVL
457, TaL 144 mm), collected on 15 June 2005. Both
specimens were discovered during the dry season at
night in primary karst forest near rock outcrops: the
snake ZFMK 82890 (Fig. 11) was seen when crawling
on the leaf litter and the specimen VNUH 15.6.’05-1
was found in the branches about 1.5 m above a small
Characteristic features. Prefrontals not in contact with
the eye, two preoculars, in contact with the single loreal,
1-2 suboculars between supralabials and eye, and 1-2
postoculars; 6-7 supralabials, and 15 (dorsally keeled)
scales across the midbody; 176-177 ventral scales,
78-80 divided subcaudal scales, and anal plate entire
(determination after Bourret, 1936a; b)." - (http://www.seh-herpetology.org/files...47_Ziegler.pdf
, page 8)
The above quoted material supports my hypothesis that these snakes are not 100% arboreal, but rather are semi-arboreal. They spend some time on the ground as well. Their preference is to sleep within the leaf litter, underneath rock crevices, and occasionally in sizeable nooks within the branches of the small trees or shrubs they like to be around.
It also supports what I had thought about their coloration (which I haven't yet posted). I always thought that the rich brown background, mustard yellow highlights, and black bands were for camouflage amongst leaf litter and the branches of woody shrubs or small trees. Which is now apparently evidenced to be true.
Then there's this about the general region of where they come from:
Effects of Karst Forest Degradation on Pulmonate and Prosobranch Land Snail Communities in Sabah, Malaysian Borneo - SCHILTHUIZEN - 2005 - Conservation Biology - Wiley Online Library
They're always near their source of food, and it's plentiful! No wonder they eat so damn much! They can afford to!
The link I posted about the feeding behaviors of snakes in the Pareatinae group, also point to the fact that they have excellent eyesight and hunt mostly through the use of sight, compared to most other snakes. Hence the huge eyes. And it also explains why they notice me watching them, even in the dark.
note: Once they perceive me as not being a threat to their safety, they slowly ignore me watching them, and they continue about their business.