Was interested in doing this since I read about it and also did a reverse-image search on it as well.
What do you think?
I was ballparking the length of it (since I was compressing it big time, with full-on restraint; tail, of course, making the most of it's length,
and the body needing to arch backward a bit as well), but I was thinking more how they would fit this behemoth within a 5mx5mx5m acid-proof tank; not to mention, how the thing was able to (still) chomp down on the poor fool eaten while getting a recording of it before talking, and since the incident, how the restraint on it's mouth would also be linked to the same apparatus that also binds it's arms and legs, as well as it's tail.
I also made sure to make him rather fuzzy, in nature (more like lots of hair, rather than feathers, considering the image, and the origins of the creature itself likely not following the same structure of our reptiles) in order to be consistent with the image. Having done a reverse-image search,
knowing of the origins made me interpret the head shape better. I also included a diagram of how the head would look up-front, closed and half-open. He can still see you as he chomps forth. And even half-opened is enough to be like a crocodile, and he still has more range to chomp down with. More than enough to gobble up a fully grown adult or 2 whole.
This was a rough 15-minute rendering. About 1/12 the time it takes for me to make my better works (and those I haven't done in freaking ages). This was more a character drawing session, if anything. If anyone wants to render it in 3D, be my guest; and maybe we can toss this into SCP:CB while at it (at least, suggesting this appearance if it gets featured as wandering about.