That’s a tarantula. It’s been colonized by cordyceps, a fungus that “invades and eventually replaces the host tissue.” I’m not sure what the temperature/climate effect will be on this fungus - hit me up if you know, here.
There’s an epic Reddit thread, here. In this gross video, David Attenborough explains how the fungus works (not for the squeamish).
Via BoingBoing. Follow Climate Adaptation.