40d:Giant cave swallow
Giant cave swallows are giant colorful birds which commonly live in chasms and caves. They are two sizes smaller than Giant bats but have the same attack power. They will attack your dwarves if they come too close, and are quite able to kill your average civilian dwarf.
The fact that they move through Z-levels a lot makes them hard to hit with crossbows.
Do not confuse the initials of the giant cave swallow with those of a far more dangerous creature.
[CREATURE:BIRD_SWALLOW_CAVE_GIANT] [NAME:giant cave swallow:giant cave swallows:giant cave swallow] [TILE:'C'][COLOR:0:0:1] [MODVALUE:5] [LARGE_ROAMING][DIFFICULTY:2] [FLIER] [GENPOWER:3][NATURAL][PET_EXOTIC][MOUNT_EXOTIC] [PETVALUE:700] [PREFSTRING:coloration] [BODY:HUMANOID_ARMLESS:2WINGS:2EYES:2LUNGS:HEART:GUTS:ORGANS:HUMANOID_JOINTS:THROAT:NECK:SPINE:BRAIN:4TOES:BEAK] [SIZE:8] [MAXAGE:10:20] [ATTACK:MAIN:BYTOKEN:BEAK:bite:bites:1:6:GORE][ATTACKFLAG_CANLATCH] [CHILD:1][CHILDNAME:giant cave swallow hatchling:giant cave swallow hatchlings] [FAT:3] [ALL_ACTIVE] [BIOME:SUBTERRANEAN_CHASM] [STANDARD_FLESH] [HOMEOTHERM:10067] [LAYERING:100] [SWIMS_INNATE][SWIM_SPEED:2500] [POPULATION_NUMBER:15:30] [BENIGN]