I like the "very last dwarves in the world" games, so I ususally create a number of worlds and chose one that does not have any dwarves. It works fine in 40d, but two worlds I tried in 40d11 still have dwarven caravans and immigrants showing up.
1: Shoneth Strir, "The Hell of Rages", a cave
1 giant
6 trolls
256 bats
299 purring maggots
2: Specutsasmcith, "Craftgutter", a cave
5 troglodytes
422 purring maggots
396 bats
3: Oyomoenira, "The Harmonious Heart", a cave
1 giant
4 giant rats
436 purring maggots
448 bats
4: Mukarurrth, "Sadnessscar", a cave
1 hydra
3 giant rats
367 purring maggots
453 bats
5: Mfao Cana, "The Hell of Shins", a cave
Owner: Draymbin, kobolds
Parent Civ: Galdis, kobolds
Leader: Pradin, kobold
40 kobolds
6: Ebdibora Cucamosman, "Staffmined the Impervious Shadow", a cave
1 giant
5 antmen
404 bats
479 purring maggots
7: Thalesanene Idaba Lawa, "Containecho the Comedy of Soothing", a cave
3 cyclopes
6 large rats
432 bats
8: Ecenkul, "The Oaken Hole", a cave
1 cyclops
5 cave swallowmen
315 bats
9: Totsnostngogngo, "Guardedmines", a cave
2 giants
5 giant rats
428 bats
10: Thfiiquila Umethedimati, "Beltumbral the Torturous Grotto", a cave
5 giants
4 gremlins
316 bats
487 purring maggots
11: Etkkon, "The Fleshy Gutter", a cave
1 giant
4 giant moles
487 bats
411 cave spiders
12: Zukxngogngo Angkasp Uslo, "Tonemines the Sandal of Cinders", a cave
1 giant
4 giant moles
312 bats
307 cave spiders
13: Ozoebr, "The Stormy Murk", a cave
1 ettin
3 trolls
293 bats
380 cave spiders
14: Meli Darame, "The Murk of Armories", a cave
1 giant
5 ratmen
424 purring maggots
288 bats
15: Galka Eslul, "The Deeps of Menacing", a cave
1 giant
3 giant moles
272 cave spiders
377 bats
16: Ulbunul, "Squirteddank", a cave
1 cyclops
5 troglodytes
273 bats
478 purring maggots
17: Amafenimo Tof Alu, "Languishpit the Crevices of Water", a cave
3 giants
2 giant moles
437 bats
463 purring maggots
18: b Urlut, "The Shaft of Symmetry", a cave
1 ettin
2 large rats
482 purring maggots
296 bats
19: Estunalth, "Boundbolt", a mountain fortress
20: Lozaspngokang, "Sneakcurses", a dark fortress
Owner: The Midnight of Soothing, goblins
Parent Civ: The Sizzling Lie, goblins
Leader: Nguslu Plagueinks, goblin
45 goblins
1 demon
21: QuĦlelieletha, "Latherthundered", a forest retreat
Owner: The Named Gullies, elves
Parent Civ: The Grove of Weakening, elves
Leader: Fewetha Satinprairies, elf
63 elves
22: Uzukor, "Beesorder", a town
23: Behalkem, "Kingdominch", a town
Owner: The Messianic Society, humans
Parent Civ: The Tactical Nations, humans
Leader: Omon Bodicereign, human
43 humans
24: Picthambedo, "Spiraldistant", a town
25: Evaneeliye, "Risenskies", a forest retreat
Owner: The Grasping Blaze, elves
Parent Civ: The Grove of Weakening, elves
Leader: Ditari Gladeflickers the Bold Race of Glaciers, elf
64 elves
26: Sidayaseneri, "Larkspell", a forest retreat
Owner: The Bright Forests, elves
Parent Civ: The Grove of Weakening, elves
Leader: Enina Seedwilted, elf
60 elves
27: Avefecaci, "Woodbreached", a forest retreat
Owner: The Musical Bird, elves
Parent Civ: The Grove of Weakening, elves
Leader: Ola Flightchamber, elf
140 elves
28: Cailuavetho, "Galleydeserts", a forest retreat
Owner: The Reticent Fell, elves
Parent Civ: The Grove of Weakening, elves
Leader: Caraca Flowernation, elf
149 elves
29: Ireneamu, "Dellcreature", a forest retreat
Owner: The Crab of Excavating, elves
Parent Civ: The Grove of Weakening, elves
Leader: IthithĦ Skirttyphoons, elf
126 elves
30: Blalouth, "Pinesallied", a forest retreat
Owner: The Twigs of Puzzling, elves
Parent Civ: The Grove of Weakening, elves
Leader: Avafi Mawcrews, elf
141 elves
31: Thithuimere, "Snarlrain", a forest retreat
Owner: The Mountain of Phrases, elves
Parent Civ: The Grove of Weakening, elves
Leader: Lefari Beardedletter, elf
145 elves
32: Lidavale, "Romancebeasts", a forest retreat
Owner: The Allied Moth, elves
Parent Civ: The Grove of Weakening, elves
Leader: Ale Walledcanyon, elf
101 elves
33: Neranidela, "Conjuredusks", a forest retreat
Owner: The Rosy Heather, elves
Parent Civ: The Grove of Weakening, elves
Leader: Lulo Nutsenter, elf
50 elves
34: Dafoethare, "Weathersoldier", a forest retreat
Owner: The Confusing Winds, elves
Parent Civ: The Grove of Weakening, elves
Leader: Oda Pearladore, elf
88 elves
35: Amayivaci, "Pearlglaciers", a forest retreat
Owner: The Cobra of Shields, elves
Parent Civ: The Grove of Weakening, elves
Leader: Fma Fordowned, elf
113 elves
36: Minanawara, "Foresttwilight", a forest retreat
Owner: The Heather of Denominations, elves
Parent Civ: The Grove of Weakening, elves
Leader: Sal˘ Seaechoed, elf
95 elves
37: CanaĦlime, "Shinhorn", a forest retreat
Owner: The Distant Bear, elves
Parent Civ: The Grove of Weakening, elves
Leader: Covema Waxford, elf
62 elves
38: Apacarofa, "Greatbeached", a forest retreat
Owner: The Fang of Canyons, elves
Parent Civ: The Grove of Weakening, elves
Leader: Icem Fangstake, elf
100 elves
39: Thasaalino, "Hotdawn", a forest retreat
Owner: The Warm Seasons, elves
Parent Civ: The Grove of Weakening, elves
Leader: Sidaya Waspscraped, elf
69 elves
40: Disatape, "Valleysubmerge", a forest retreat
Owner: The Dawn of Vegetation, elves
Parent Civ: The Grove of Weakening, elves
Leader: Vinena Fastenedhorn, elf
42 elves
41: Lorayupe, "Fieldpull", a forest retreat
Owner: The Coast of Clutching, elves
Parent Civ: The Grove of Weakening, elves
Leader: Cata Shellskins, elf
32 elves
Outdoor Animal Populations (Including Undead)
327 alligators
3197 cougars
31365 groundhogs
5257 muskoxen
4347 elk
15277 horses
57180 rhesus macaques
944 werewolves
1173 harpies
621 ogres
19030 wolves
553 giant eagles
4240 sasquatches
11684 mountain goats
16364 hoary marmots
2057 grizzly bears
12233 deer
552 leopards
666 jaguars
4823 two-humped camels
7258 one-humped camels
10314 raccoons
8088 foxes
2103 black bears
511 giant jaguars
663 giant leopards
238 giant desert scorpions
1714 slugmen
1309 snailmen
16659 basking sharks
8963 great white sharks
4408 sturgeons
15471 opah
15620 frill sharks
10134 bluefish
4660 swordfish
11693 halibut
15334 cod
176 merpeople
616 sea serpents
10848 conger eels
9862 marlins
11333 sea lampreys
3936 unicorns
16226 longfin mako sharks
3720 blue sharks
2480 nurse sharks
17778 spiny dogfish
3720 spotted wobbegongs
8177 common skates
12987 shortfin mako sharks
9139 angelsharks
11544 whales
7215 hammerhead sharks
974564 dragonflies
1102849 toads
1027518 turtles
1114346 rats
11181808 flies
776164 monarch butterflies
1076832 large roaches
1107512 lizards
781787 fireflies
660329 cardinals
168369 grackles
675876 blue jays
573700 bats
212244 blood gnats
29463 knuckle worms
31326 demon rats
379045 hedgehogs
1254329 two-legged rhino lizards
871722 moghoppers
9058067 acorn flies
4182 red squirrels
115136 cave swallows
209125 fox squirrels
335916 chipmunks
37143 gray squirrels
102393 fairies
1231661 pixies
138766 fluffy wamblers
7069 orioles
153969 hagfish
301582 shads
207783 bat rays
301319 oysters
172380 mackerel
567100 herrings
237358 salmon
300364 hake
541951 anchovies
265586 mussels
190896 brook lampreys
217829 flounders
188900 sole
7316 sea nettle jellyfish
225387 steelhead trout
206349 seahorses
86222 red-winged blackbirds
Unnumbered worms
Unnumbered beetles
Unnumbered ants