I thought about putting this in modding, but I think it is more relevant to adventure mode. Anyway, I have a hypothesis about why this is happening. I left some stuff about corrupts appearing in the wild in their creature files, along with the [LARGE_PREDATOR] tag and some others like it, which may have something to do with it. Oh, and they're [EVIL]. That's probably a factor.
[CREATURE:CORRUPT]
[DESCRIPTION:A medium-sized creature that may once have been alive. Now, it is merely a twisted perversion of nature.]
[NAME:corrupt:corrupts:corrupt]
[CASTE_NAME:corrupt:corrupts:corrupt]
[CREATURE_TILE:'C'][COLOR:0:0:1]
[CANOPENDOORS]
[PETVALUE:500]
[LARGE_ROAMING][LARGE_PREDATOR][LIKES_FIGHTING][NO_EAT][NO_DRINK]
[NOPAIN][FIREIMMUNE][FIREIMMUNE_SUPER][MAGMA_VISION]
[NO_DIZZINESS][NO_FEVERS][NONAUSEA][NOSTUN][NOEXERT][NO_SLEEP]
[POPULATION_NUMBER:5:10][FREQUENCY:33]
[CLUSTER_NUMBER:1:3][LOOSE_CLUSTERS]
[BIOME:ANY_SAVANNA]
[BIOME:ANY_DESERT]
[EVIL][MEANDERER][PET][FLIER]
[SPEED:1000]
[INTELLIGENT]
[TRANCES]
[PREFSTRING:twisted features]
[BODY:HUMANOID:2EYES:2EARS:NOSE:2LUNGS:HEART:GUTS:ORGANS:HUMANOID_JOINTS:THROAT:NECK:SPINE:BRAIN:SKULL:5FINGERS:5TOES:MOUTH:FACIAL_FEATURES:TEETH:RIBCAGE:2WINGS]
[BODY_DETAIL_PLAN:STANDARD_MATERIALS]
[BODY_DETAIL_PLAN:STANDARD_TISSUES]
[TISSUE:DARKMUSCLE]
[TISSUE_NAME:darkmetal:NP]
[TISSUE_MATERIAL:INORGANIC:DARKMETAL]
[MAT_FIXED_TEMP:11000]
[THICKENS_ON_STRENGTH]
[ARTERIES]
[MUSCULAR]
[VASCULAR:5]
[RELATIVE_THICKNESS:3]
[HEALING_RATE:250]
[CONNECTS]
[TISSUE_SHAPE:LAYER]
[TISSUE:DARKBONE]
[TISSUE_NAME:darksteel:NP]
[TISSUE_MATERIAL:INORGANIC:DARKSTEEL]
[MAT_FIXED_TEMP:11000]
[MUSCULAR]
[STRUCTURAL]
[VASCULAR:3]
[RELATIVE_THICKNESS:2]
[HEALING_RATE:250]
[CONNECTS]
[TISSUE_SHAPE:LAYER]
[BODY_DETAIL_PLAN:VERTEBRATE_TISSUE_LAYERS:SKIN:FAT:DARKMUSCLE:DARKBONE:CARTILAGE]
[BODY_DETAIL_PLAN:HEAD_HAIR_TISSUE_LAYERS]
[USE_TISSUE_TEMPLATE:EYEBROW:EYEBROW_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:HEAD:EYEBROW:ABOVE:BY_CATEGORY:EYE]
[USE_TISSUE_TEMPLATE:EYELASH:EYELASH_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:EYELID:EYELASH:FRONT]
[USE_MATERIAL_TEMPLATE:NAIL:NAIL_TEMPLATE]
[USE_TISSUE_TEMPLATE:NAIL:NAIL_TEMPLATE]
[TISSUE_LAYER:BY_CATEGORY:FINGER:NAIL:FRONT]
[TISSUE_LAYER:BY_CATEGORY:TOE:NAIL:FRONT]
[SELECT_TISSUE_LAYER:HEART:BY_CATEGORY:HEART]
[PLUS_TISSUE_LAYER:SKIN:BY_CATEGORY:THROAT]
[TL_MAJOR_ARTERIES]
[BODY_DETAIL_PLAN:FACIAL_HAIR_TISSUES]
[BODY_DETAIL_PLAN:STANDARD_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_HEAD_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RIBCAGE_POSITIONS]
[BODY_DETAIL_PLAN:HUMANOID_RELSIZES]
[USE_MATERIAL_TEMPLATE:SINEW:SINEW_TEMPLATE]
[SELECT_MATERIAL:SINEW]
[STATE_COLOR:ALL_SOLID:GRAY]
[STATE_NAME:ALL_SOLID:biometallic sinew]
[STATE_ADJ:ALL_SOLID:biometallic sinew]
[IMPACT_YIELD:542500]
[IMPACT_FRACTURE:1085000]
[IMPACT_STRAIN_AT_YIELD:319]
[COMPRESSIVE_YIELD:542500]
[COMPRESSIVE_FRACTURE:1085000]
[COMPRESSIVE_STRAIN_AT_YIELD:319]
[TENSILE_YIELD:155000]
[TENSILE_FRACTURE:310000]
[TENSILE_STRAIN_AT_YIELD:73]
[TORSION_YIELD:155000]
[TORSION_FRACTURE:310000]
[TORSION_STRAIN_AT_YIELD:189]
[SHEAR_YIELD:155000]
[SHEAR_FRACTURE:310000]
[SHEAR_STRAIN_AT_YIELD:189]
[BENDING_YIELD:155000]
[BENDING_FRACTURE:310000]
[BENDING_STRAIN_AT_YIELD:73]
[TENDONS:LOCAL_CREATURE_MAT:SINEW:200]
[LIGAMENTS:LOCAL_CREATURE_MAT:SINEW:200]
[SELECT_MATERIAL:ALL]
[HEATDAM_POINT:NONE]
[MELTING_POINT:NONE]
[BOILING_POINT:NONE]
[IGNITE_POINT:NONE]
[BLOOD:INORGANIC:IRON:LIQUID]
[CREATURE_CLASS:GENERAL_POISON]
[GETS_WOUND_INFECTIONS]
[GETS_INFECTIONS_FROM_ROT]
[USE_MATERIAL_TEMPLATE:PUS:PUS_TEMPLATE]
[PUS:LOCAL_CREATURE_MAT:PUS:LIQUID]
[PHYS_ATT_RANGE:AGILITY:700:1200:1400:1500:1600:1800:2500] ++
[PHYS_ATT_RANGE:STRENGTH:700:1200:1400:1500:1600:1800:2500] ++
[PHYS_ATT_RANGE:TOUGHNESS:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:ANALYTICAL_ABILITY:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:FOCUS:700:1200:1400:1500:1600:1800:2500] ++
[MENT_ATT_RANGE:CREATIVITY:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:PATIENCE:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:MEMORY:450:950:1150:1250:1350:1550:2250] +
[MENT_ATT_RANGE:SPATIAL_SENSE:700:1200:1400:1500:1600:1800:2500] ++
[NATURAL_SKILL:BITE:6]
[NATURAL_SKILL:GRASP_STRIKE:6]
[NATURAL_SKILL:STANCE_STRIKE:6]
[NATURAL_SKILL:MELEE_COMBAT:6]
[NATURAL_SKILL:SITUATIONAL_AWARENESS:6]
[BODY_SIZE:0:0:3000]
[BODY_SIZE:1:168:20000]
[BODY_SIZE:12:0:60000]
[BODY_APPEARANCE_MODIFIER:HEIGHT:75:95:98:100:102:105:125]
[APP_MOD_IMPORTANCE:500]
[BODY_APPEARANCE_MODIFIER:BROADNESS:75:95:98:100:102:105:125]
[APP_MOD_IMPORTANCE:500]
[SET_BP_GROUP:BY_CATEGORY:EYE]
[BP_APPEARANCE_MODIFIER:CLOSE_SET:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyes:PLURAL]
[BP_APPEARANCE_MODIFIER:DEEP_SET:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyes:PLURAL]
[BP_APPEARANCE_MODIFIER:ROUND_VS_NARROW:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyes:PLURAL]
[BP_APPEARANCE_MODIFIER:LARGE_IRIS:25:70:90:100:110:130:200]
[APP_MOD_NOUN:eyes:PLURAL]
[APP_MOD_DESC_RANGE:30:60:90:110:150:190]
[SET_BP_GROUP:BY_CATEGORY:LIP]
[BP_APPEARANCE_MODIFIER:THICKNESS:50:70:90:100:110:130:200]
[APP_MOD_NOUN:lips:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:150:190]
[SET_BP_GROUP:BY_CATEGORY:NOSE]
[BP_APPEARANCE_MODIFIER:BROADNESS:25:70:90:100:110:130:200]
[APP_MOD_DESC_RANGE:30:60:90:110:150:190]
[BP_APPEARANCE_MODIFIER:LENGTH:25:70:90:100:110:130:200]
[APP_MOD_DESC_RANGE:30:60:90:110:150:190]
[BP_APPEARANCE_MODIFIER:UPTURNED:0:70:90:100:110:130:200]
[BP_APPEARANCE_MODIFIER:CONVEX:0:70:90:100:110:130:200]
[APP_MOD_NOUN:nose bridge:SINGULAR]
[SET_BP_GROUP:BY_CATEGORY:EAR]
[BP_APPEARANCE_MODIFIER:SPLAYED_OUT:0:70:90:100:110:130:200]
[APP_MOD_NOUN:ears:PLURAL]
[BP_APPEARANCE_MODIFIER:HANGING_LOBES:0:70:90:100:110:130:200]
[APP_MOD_NOUN:ears:PLURAL]
[BP_APPEARANCE_MODIFIER:BROADNESS:90:95:98:100:102:105:110]
[APP_MOD_IMPORTANCE:700]
[APP_MOD_NOUN:ears:PLURAL]
[APP_MOD_DESC_RANGE:91:94:98:102:106:109]
[BP_APPEARANCE_MODIFIER:HEIGHT:90:95:98:100:102:105:110]
[APP_MOD_IMPORTANCE:700]
[APP_MOD_NOUN:ears:PLURAL]
[APP_MOD_DESC_RANGE:91:94:98:102:106:109]
[SET_BP_GROUP:BY_CATEGORY:TOOTH]
[BP_APPEARANCE_MODIFIER:GAPS:0:70:90:100:110:130:200]
[APP_MOD_NOUN:teeth:PLURAL]
[SET_BP_GROUP:BY_CATEGORY:SKULL]
[BP_APPEARANCE_MODIFIER:HIGH_CHEEKBONES:0:70:90:100:110:130:200]
[BP_APPEARANCE_MODIFIER:BROAD_CHIN:0:70:90:100:110:130:200]
[BP_APPEARANCE_MODIFIER:JUTTING_CHIN:0:70:90:100:110:130:200]
[BP_APPEARANCE_MODIFIER:SQUARE_CHIN:0:70:90:100:110:130:200]
[SET_BP_GROUP:BY_CATEGORY:THROAT]
[BP_APPEARANCE_MODIFIER:DEEP_VOICE:0:70:90:100:110:130:200]
[BP_APPEARANCE_MODIFIER:RASPY_VOICE:0:70:90:100:110:130:200]
[SET_BP_GROUP:BY_CATEGORY:HEAD]
[BP_APPEARANCE_MODIFIER:BROADNESS:90:95:98:100:102:105:110]
[APP_MOD_IMPORTANCE:700]
[APP_MOD_DESC_RANGE:91:94:98:102:106:109]
[BP_APPEARANCE_MODIFIER:HEIGHT:90:95:98:100:102:105:110]
[APP_MOD_IMPORTANCE:700]
[APP_MOD_DESC_RANGE:91:94:98:102:106:109]
[MAXAGE:300:340]
[ATTACK:PUNCH:BODYPART:BY_TYPE:GRASP]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:punch:punches]
[ATTACK_CONTACT_PERC:100]
[ATTACK_FLAG_WITH]
[ATTACK_PRIORITY:MAIN]
[ATTACK:KICK:BODYPART:BY_TYPE:STANCE]
[ATTACK_SKILL:STANCE_STRIKE]
[ATTACK_VERB:kick:kicks]
[ATTACK_CONTACT_PERC:100]
[ATTACK_FLAG_WITH]
[ATTACK_PRIORITY:SECOND]
[ATTACK:SCRATCH:CHILD_TISSUE_LAYER_GROUP:BY_TYPE:GRASP:BY_CATEGORY:FINGER:NAIL]
[ATTACK_SKILL:GRASP_STRIKE]
[ATTACK_VERB:scratch:scratches]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PRIORITY:SECOND]
[ATTACK:BITE:CHILD_BODYPART_GROUP:BY_CATEGORY:HEAD:BY_CATEGORY:TOOTH]
[ATTACK_SKILL:BITE]
[ATTACK_VERB:bite:bites]
[ATTACK_CONTACT_PERC:100]
[ATTACK_PENETRATION_PERC:100]
[ATTACK_FLAG_EDGE]
[ATTACK_PRIORITY:SECOND]
[ATTACK_FLAG_CANLATCH]
[CHILD:10]
[GENERAL_CHILD_NAME:corrupt child:corrupt children]
[CHILDNAME:corrupt child:corrupt children]
[EQUIPS]
[ALL_ACTIVE]
[MUNDANE]
[SPEECH:dwarf.txt]
[HOMEOTHERM:11000]
[SWIMS_LEARNED][SWIM_SPEED:2500]
[PERSONALITY:IMMODERATION:0:55:100]
[PERSONALITY:VULNERABILITY:0:45:100]
[PERSONALITY:STRAIGHTFORWARDNESS:0:55:100]
[MANNERISM_FINGERS:finger:fingers]
[MANNERISM_NOSE:nose]
[MANNERISM_EAR:ear]
[MANNERISM_HEAD:head]
[MANNERISM_EYES:eyes]
[MANNERISM_MOUTH:mouth]
[MANNERISM_HAIR:hair]
[MANNERISM_KNUCKLES:knuckles]
[MANNERISM_LIPS:lips]
[MANNERISM_CHEEK:cheek]
[MANNERISM_NAILS:nails]
[MANNERISM_FEET:feet]
[MANNERISM_ARMS:arms]
[MANNERISM_HANDS:hands]
[MANNERISM_TONGUE:tongue]
[MANNERISM_LEG:leg]
[MANNERISM_LAUGH]
[MANNERISM_SMILE]
[MANNERISM_WALK]
[MANNERISM_SIT]
[MANNERISM_BREATH]
[MANNERISM_POSTURE]
[MANNERISM_STRETCH]
[MANNERISM_EYELIDS]
[CASTE:FEMALE]
The gender tag lets it know how breeding works.
[FEMALE]
[MULTIPLE_LITTER_RARE]
To add beards, put square brackets around the following:
BODY_DETAIL_PLAN:FACIAL_HAIR_TISSUE_LAYERS
[CASTE:MALE]
[MALE]
[BODY_DETAIL_PLAN:FACIAL_HAIR_TISSUE_LAYERS]
[SELECT_CASTE:ALL]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:EYELASH]
[TL_COLOR_MODIFIER:AMBER:1:AUBURN:1:BLACK:1:BROWN:1:BUFF:1:BURNT_SIENNA:1:BURNT_UMBER:1:CHARCOAL:1:CHESTNUT:1:CHOCOLATE:1:CINNAMON:1:COPPER:1:DARK_BROWN:1:DARK_CHESTNUT:1:DARK_TAN:1:ECRU:1]
[TLCM_NOUN:hair:SINGULAR]
[TL_COLOR_MODIFIER:GRAY:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:80:0:130:0]
[TL_COLOR_MODIFIER:WHITE:1]
[TLCM_NOUN:hair:SINGULAR]
[TLCM_TIMING:ROOT:130:0:150:0]
[SET_TL_GROUP:BY_CATEGORY:HEAD:EYEBROW]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyebrows:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[TISSUE_LAYER_APPEARANCE_MODIFIER:HIGH_POSITION:0:70:90:100:110:130:200]
[APP_MOD_NOUN:eyebrows:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:HEAD:EYELASH]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:50:80:90:100:110:120:150]
[APP_MOD_NOUN:eyelashes:PLURAL]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[TISSUE_LAYER_APPEARANCE_MODIFIER:LENGTH:0:0:0:0:0:0:0]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_RATE:1:DAILY:0:1000:0:0:NO_END]
[APP_MOD_DESC_RANGE:10:25:75:125:200:300]
[TISSUE_LAYER_APPEARANCE_MODIFIER:CURLY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:GREASY:0:70:90:100:110:130:200]
[APP_MOD_NOUN:hair:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:DENSE:50:80:90:100:110:120:150]
[APP_MOD_NOUN:hair:SINGULAR]
[APP_MOD_DESC_RANGE:55:70:90:110:130:145]
[SET_TL_GROUP:BY_CATEGORY:HEAD:HAIR]
[TISSUE_STYLE_UNIT:HAIR:STANDARD_HAIR_SHAPINGS]
[TSU_NOUN:hair:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:CHEEK_WHISKERS]
[PLUS_TL_GROUP:BY_CATEGORY:HEAD:CHIN_WHISKERS]
[TISSUE_STYLE_UNIT:BEARD:STANDARD_BEARD_SHAPINGS]
[TSU_NOUN:beard:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:MOUSTACHE]
[TISSUE_STYLE_UNIT:MOUSTACHE:STANDARD_MOUSTACHE_SHAPINGS]
[TSU_NOUN:moustache:SINGULAR]
[SET_TL_GROUP:BY_CATEGORY:HEAD:SIDEBURNS]
[TISSUE_STYLE_UNIT:SIDEBURNS:STANDARD_SIDEBURNS_SHAPINGS]
[TSU_NOUN:sideburns:PLURAL]
[SET_TL_GROUP:BY_CATEGORY:ALL:SKIN]
[TL_COLOR_MODIFIER:BROWN:1:BURNT_UMBER:1:CINNAMON:1:COPPER:1:DARK_BROWN:1:DARK_PEACH:1:DARK_TAN:1:ECRU:1:PALE_BROWN:1]
[TLCM_NOUN:skin:SINGULAR]
[TISSUE_LAYER_APPEARANCE_MODIFIER:WRINKLY:0:0:0:0:0:0:0]
[APP_MOD_RATE:1:YEARLY:0:50:200:0:NO_END]
[APP_MOD_NOUN:skin:SINGULAR]
[APP_MOD_DESC_RANGE:0:0:0:1:25:50]
[SET_TL_GROUP:BY_CATEGORY:EYE:EYE]
[TL_COLOR_MODIFIER:IRIS_EYE_BRASS:1:IRIS_EYE_BRONZE:1:IRIS_EYE_COPPER:1:IRIS_EYE_OCHRE:1:IRIS_EYE_RAW_UMBER:1:IRIS_EYE_RUST:1:IRIS_EYE_SILVER:1:IRIS_EYE_SLATE_GRAY:1]
[TLCM_NOUN:eyes:PLURAL]
Note that they aren't actually usable as-is; there are some modded materials in there. You can find the complete information in the modding section.
The entity files are almost exact copies of the human files, with the only real change being that all of their ethics are now ACCEPTABLE.
EDIT: Oh, and remember that corrupt I had to kill?
Yeah. I eventually decided to kill Par, earning me the wrath of every corrupt in the civilization, including the ones who had sent me to kill her. When I went to report it to a human lord (who had
also sent me after Par), he just said "rumors from distant lands cannot save us. Note that his castle was literally seven travel map tiles from the castle where Par was.