Started a terrifying savannah fort. (Appropriately named Lovelashed) 145 Giant Mosquitos showed up at one point, along with some Giant Hamsters. Luckily, the mosquitos flew through an unholy mist, (A pretty weak one. All it seems to do is nauseate things for a few seconds. Now my landscape is awash in mosquito vomit.) which seemed to make them decide to fly off.
Animal men are everywhere for some reason. Mosquitomen, Thripsmen, Ottermen, Spongemen, Peregrinepeople, and Peach-faced Lovebirdfolk just to name a few.
My dwarves refuse to drink. The nearby water has a Sea Lamprey in it on one side, and a Giant Sponge on the other, and the sight of the aquatic life is interrupting the task.
For some reason, none of the various insectoid life (Giant Moths, Thrips, Mosquitos, Lice, etc. etc.) has bothered to attack me. My only combat log so far detailed an encounter with a Giant Hedgehog that just rolled into a ball until my woodcutter left, at which point it made a beeline for the edge of the map.
The main thing is that I keep getting those mists. Constantly. I can't seem to keep the game unpaused for more than 2 minutes.
Meanwhile, a quick check of legends mode indicates that I may only have one necromancer's tower in my world. With something like 20 necromancers in it, all of whom spend their time churning out autobiographical treatises with names like "Can Bern Mithronsul Save the World?"