[Bigg Red]

I suspect it is called vampire because of the two appendages resembling fangs, which are quite prominent in the 3rd from last frame above.

[green pastures]

I think those are just part of it’s set of legs, but look more prominent because of the angle and lighting of the picture...

[comraderie]

Indeed. Also because it shuns sunlight, dwelling primarily in the lightless depths. Besides, look at this illustration of the creature and tell me how it's possible NOT to think of Nosferatu!