If the picture in the article is correct, it's a burmese python, which are much "chunkier" than a retic. Just like an anaconda might not grow as long as a retic but they can weigh twice as much. Although it does seem a little dodgy for it to drag him into a tree. Neither burmese pythons nor reticulated pythons are mainly arboreal, and it'd make much more sense for it to kill him where it grabbed him.
