Why is this outdated? :(

because i didnt have time or motivation to paint blood on all the new corpses

Would enabling this mod in 0.17 replace the biters sprites to the old ones then?

no but this one does: https://mods.factorio.com/mod/0_16_graphics

if anybody wants to help me: i need copies of the dying animations in that format, just with the blood (without the model) (as mask).
its enough if there's only blood on the last frame and with fading transparency on the previous frames.
for the worm i need the blood mask on all the frames without having the animation flickering or looking weird (imitate the 3d model)
and all that in white, blood-red and rainbow color.

it's updated, but currently no support for my 0.16 graphics mod.

Thanks for the update ;)