Malaysian brongersmai aren't strictly red with tan heads, nor are Sumatran brongersmai strictly red with black heads, to further add to your confusion. Blood pythons range from Sumatra to Thailand to Malaysia, and can also be found on several outlying islands in that region. They can range in color from dark chocolate brown to brilliant light red, nearly pink, with black, gray, brown or red heads. The color phases aren't specifically tied to localities in a strict sense.
Also, the yellow-headed black Sumatran short-tailed pythons (Python curtus) don't necessarily top out at three feet. We've had females over the years that were well into the 5' range. The black-headed (and chrome-headed) Python curtus do tend to be a quite a bit larger than the yellow/orange-headed varieties. Overall P. curtus are considered to be the "smallest" of the three species, but it's all kind of relative.
With regards to Borneos & race - there is a population of P. breitensteini found in Sarawak, and they are distinctly different in appearance. There is a small captive population as well, and they're fascinating animals.
Most of our bloods (P. brongersmai), SSTPs (P. curtus) and BSTPs (P. breitensteini) are very similar in size/weight, but we also raise them all the same way.Typical size/weight in our collection is in the range of 4.5' - 5.5' and 12-18 lbs. We have some snakes that are easily 6'+ and quite a bit heavier (20+ lbs), and that's in all three species. The largest examples of each species in our collection are also at least 10 years old.
Best snakes ever!
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