It's [UTTERANCES]. Not impossible that caves have something to do with it, but my kobolds build towns and still don't get babysnatched. Ditto for the civilized races that don't speak.
I use a lot of babysnatchers in my mod Relentless Assault, and one of my favorite activities is finding large, multicultural empires.
The Past Nation -- Humans
* This civilization has never known a king *
Budoikar, "Roarankle" a town
Lead by Boki Toldden, a human of The League of Fishing
Bujitstren, "Scrapedpasses" a town
Lead by Arstruk Menacebreeds the Constructive Ivy-Spoils of Combat, a goblin of The Band of Racks
Chakakadin, "Chakakadin" a town
Lead by Hok Fountaindangled, a human of The Society of Weather
Chrabajoker, "Chrabajoker" a town
Lead by Kafit Burnedtwinkles, a human of The Incidental Group of Frenzies
Chrilgus, "Chrilgus" a town
Lead by Speski Murkhum, a goblin of The Young Council
Cokusu, "Chuckhollow" a town
Lead by Erab Scrapewet, a human of The League of Crews
Drafadakaris, "Drafadakaris" a town
Lead by Lon Insightscrubs the Priest of Shadow, a human of The Councils of Honoring
Dulithran, "Rootdawned" a town
Lead by Ata Fiercebutter, a human of The Uncommon Society
Gaprongus, "Gaprongus" a town
Lead by Fensast Cookedtreats, a human of The Group of Shafts
Getaktura, "Utterbrains" a town
Lead by Bosa Passiondungeon, a goblin of The True Coalition
Gliklulber, "Gliklulber" a town
Lead by Stsost Scourgechanced, a goblin of The Group of Spirit
Kigilichonkin, "Kigilichonkin" a town
Lead by Tukstis Glidedpick, a minotaur of The Impervious League
Lasodidil, "Routedropes" a town
Lead by Atlel Sinknives, a human of The Council of Infamy
Lecbemete, "Mergedwebbed" a town
Lead by Xubkib Marketgrasp, a goblin of The Humorous Coalition
Nulceladgi, "Plungedwiped" a town
Lead by Issha Fedlures, a human of The Ardent Fellowship
Ocdaanoth, "Trimgods" a town
Lead by Histek Distinctslip, a human of The Saturnine Councils
Olngdozo, "Monsterbands" a dark fortress
Lead by Specut Obscuretoast, a goblin of The Band of Stirring
Playdis, "Playdis" a town
Lead by Jath Bowedplague, a human of The Rapid League
Playlmus, "Playlmus" a town
Lead by Itvid Rulematched, a human of The Neutral Fellowship
Shrograymer, "Shrograymer" a town
Lead by Nguslu Spitedevil, a goblin of The Coalition of Consideration
Sitiescu, "Targetink" a town
Lead by Aslot Sinrampage, a goblin of The Fellowship of Mothers
Strolmis, "Strolmis" a town
Lead by Onra Spinwar, a human of The Disemboweled Group
Thedlecasot, "Gorgestrikes" a town
Lead by Jasmuk Lyricalmurdered, a human of The Absolute Coalition
Thruslankis, "Thruslankis" a town
Lead by Menung Juggledfords, a goblin of The Sizzling Council
Tistaalmo, "Wineenjoys" a town
Lead by Snodub Ancientdungeons, a goblin of The Infinite Coalition of Peeks
Ushcenmokun, "Dishuncle" a town
Lead by Azstrog Holemenaced, a goblin of The Tenebrous Coalition
Usligfuri, "Blowingkisses" a town
Lead by Bx Tormenturged, a goblin of The Droopy Coalition
74 dwarves
2 dwarves as prisoners
589 frogmen
700 goblins
2 goblins as prisoners
635 humans
5 humans as prisoners
1 kobolds
358 minotaurs
66 minotaurs as prisoners
(the Frogmen and the Kobold in this one would have been conquered, not babysnatched)
The Strong Land -- Humans
* This civilization has never known a king *
Adamavlamak, "Manhunted" a town
Lead by Kral Windroad, a gnome of The Cold Clans
Bayrbin, "Bayrbin" a town
Lead by Jal Dancedsand, a ogre of The Man of Forges
Cinayetiekler, "Murderedblossoms" a town
Lead by Thififitharber, a ogre of The Captain of Life
Dastlokin, "Dastlokin" a town
Lead by Brokenflute the Summer of Laws, a minotaur of The Black Men
Dikensharki, "Thornsongs" a town
Lead by Jlabis, a ogre of The Church of Love
Dondurmakel, "Frozenhands" a town
Lead by Necklaceelf, a gnome of The Lady of Keys
Ejderhauurum, "Dragoncliff" a town
Lead by Kogan Hallpearl, a gnome of The Mysterious Church
Gizliagach, "Secrettree" a town
Lead by Ringcliffs, a gnome of The Creative Kings
Gokyuzucinayet, "Heavenmurder" a town
Lead by Uurum Foxriver, a human of The Queen of Emeralds
Gunty, "Dayfeather" a town
Lead by Fusrolder Flowerseas, a ogre of The Strong Father
Gldavul, "Rosedrums" a town
Lead by Lrafadalaris, a ogre of The Golden Churches
Hkimkis, "Lordwinters" a town
Lead by Vakit Murderlion, a ogre of The Secret Men
Isikeski, "Lightancients" a town
Lead by Hanim Moonmetal, a human of The Stout Clan
Kralavlamak, "Kinghunted" a town
Lead by Dayfox, a ogre of The Captain of Freezing
Pembekilise, "Pinkchurch" a town
Lead by Kogan Roadfields, a gnome of The King of Doors
Wogekima, "Ancientpearl" a town
Lead by Mysteriousbooks, a gnome of The Captain of Spears
alismakabile, "Workclans" a town
Lead by Melek Flowershore, a human of The Captain of Women
arpismayrmek, "Battlewalked" a town
Lead by Kartal Lakeoceans, a gnome of The First Captain
90 dwarves
7 dwarves as prisoners
654 gnomes
19 gnomes as prisoners
11 goblins
1 goblins as prisoners
18 humans
140 minotaurs
40 minotaurs as prisoners
336 ogres
76 ogres as prisoners
The Tick of Balls -- Goblins
*** Ruled by Ber Doomcraft ***
Agaksnang, "Puzzlethief" a dark fortress
Lead by Bosa Clanhells, a goblin of The Decisive Plague
Amxugusmul, "Seducedspit" a dark fortress
Lead by Snamoz Hatewads, a goblin of The Deceiver of Distraction
Bosaostosp, "Dungeonrooters" a dark fortress
The Rough Sins is leaderless
Ngebzonozam, "Dreadhealed" a dark fortress
Lead by Mato Lieweak the Crimson Silkiness of Entanglement, a goblin of The Nightmare of Testing
Ngebzouxmod, "Dreadrinses" a dark fortress
Lead by Nguslu Badrasps, a goblin of The Infected Poisons
Ngusluroso, "Terrorleague" a dark fortress
The Witch of Cyclones is leaderless
Ngusluslesat, "Terrorspines" a dark fortress
Lead by Rovod Tooltrammeled, a giant of The Spider of Cover
Osnunungn, "Ghoulteach" a dark fortress
Lead by Aspuz Witchstank, a goblin of The Bold Doom
Smatspobx, "Oilednightmare" a dark fortress
Lead by Kutsmob Hatredchant, a goblin of The Autumnal Deceiver
Smunstuosmze, "Liebeguils" a dark fortress
Lead by Ngom Malignspots, a goblin of The Hell of Lulling
Snodubtolto, "Plagueforks" a dark fortress
Lead by Arstruk Seducevile, a goblin of The Nightmare of Hailing
Stozungud, "Poisonvale" a dark fortress
Lead by Stsost Scourgeknots, a goblin of The Tall Seducer
Strerasosnun, "Hideousghoul" a dark fortress
The Scourge of Pinnacles is leaderless
Uksoslom, "Stealshimmer" a dark fortress
Lead by Ngebzo Monstrousspies, a goblin of The Incest of Temples
Zolakob, "Sintrumpets" a dark fortress
Lead by Ngebzo Sinmines, a goblin of The Playful Tick
Zomtomsu, "Fiendsubmerged" a dark fortress
Lead by Stsost Badspread, a goblin of The Random Spider
44 giants
595 goblins
359 humans
19 humans as prisoners
11 minotaurs
2 minotaurs as prisoners