Playing 1.7, got to the point where I can research Monsters: Final Solution. I'm guessing that this will end all those "monster attack" missions. I'm not quite ready to do it yet, as those are great training for my newer agents, but I'm going to want to do so at some point.
The other side of it is the insane completionist in me, and I wanted to make sure I researched all the creatures that would be disappearing before I pulled the trigger. So I just wanted to confirm that these are all the creatures you can run into that would be eliminated when I push the proverbial button.
Shamblers
Fenrir Wolves
Spikeboars
Mongorns (there is a king variant)
Giant Rats
Bullfrogs
Giant Beetles
Giant Bombardier Beetles
Megascorpions
Chupacabras
Shadowbats
Werewolves (variant of white werewolves)
Werecats (Variant of black werecats)
Owlmen
And a variety of giant spiders, of which I believe there are "regular" Stealth, Flame, arored, death, queens, and kings.
Have I missed any of them?