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[Evil the Cat]

Okay, so I embarked in a moist tropical broadleaf forest. Two years in, I've seen countless elephants and a few gibbons, but relatively few other creatures. This got me wondering.. does every biome of a particular type contain all creatures of a particular type, or is it like plants where only some creatures from the list are likely to appear in a particular biome?

I've heard something about being able to deplete the populations of particular animals. So if I were to engage in a wholesale slaughter of the elephants, would this ultimately reduce the proportion of elephants showing up in relation to other creatures, or would I just get less creatures overall?

[Sphalerite]

In the current version, most creatures have a frequency number defined in the raws, which appears to control for each biome the chance that any of that creature will be found in that biome.  For example, a creature with a FREQUENCY:5 will have a 5% chance to appear in any biome which it is defined as appearing in by its raws.

Each biome gets a population for each creature created when you embark, as determined by the FREQUENCY and POPULATION tags for that creature in the raw files.  Spawns of creatures which appear on the map edge are drawn from this population, and return to it when they leave.  Some type of creatures can breed in the wild, but most can't, and if you kill off all members of a species in the local population you will never see any wild members of that species appear again.  It is quite possible to completely deplete your local wild animal population.

According to my population calculator script, Tropical moist broadleaf forest may have the following wild animals:

Spoiler (click to show/hide)

   50% chance for 15-30 blue peafowls in groups of 1-4
   5% chance for 20-50 bonobos in groups of 5-10
   5% chance for 20-50 chimpanzees in groups of 5-10
   50% chance for 15-30 elephants in groups of 3-7
   5% chance for 20-50 bilous in groups of 2
   5% chance for 20-50 black-crested gibbons in groups of 2
   5% chance for 20-50 black-handed gibbons in groups of 2
   5% chance for 20-50 gray gibbons in groups of 2
   5% chance for 20-50 pileated gibbons in groups of 2
   5% chance for 20-50 siamangs in groups of 5-10
   5% chance for 20-50 silvery gibbons in groups of 2
   5% chance for 20-50 white-browed gibbons in groups of 2
   5% chance for 20-50 white-handed gibbons in groups of 2
   5% chance for 20-50 gorillas in groups of 5-10
   5% chance for 20-50 orangutans
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 10% chance for 20-50 mandrills in groups of 5-10
   if not benign: 5% chance for 2-3 tigers
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 5% chance for 10-20 stranglers in groups of 1-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

As you can see, there are a lot of different types of animal which may appear, but none are guaranteed to appear 100% of the time.

[nenjin]

There's something with animal pop tracking that Toady has yet to do, as well. At point I believe he talked about animal groups moving on and off the fortress map according to some larger regional migrations. That led into all the pop tracking stuff that has been part of the caravan, and eventually, the army arc.

So I imagine in the future, if you're in a grassland that borders a desert, you might have groups of creatures from the desert biome migrating into your map.

[Evil the Cat]

Thanks guys. That's really helpful, though it's kind of sad I probably won't ever get a unit of war gorillas from that site.

Incidentally, does this mean it's currently highly advantageous (or disadvantageous, depending on the hostility of local wildlife) to embark on a map encompassing multiple biomes in order to get the maximum number of 'rolls' on the wildlife generator, or will that not make much of a difference?

[Sphalerite]

If your embark site covers multiple biomes, you get all the populations of each of those biomes in your embark site.  So yes, if you want a larger population of wild animals, pick an embark site that contains as many biomes as possible.

[Naryar]

Gorillas do appear in tropical moist broadleaf forests. Just not often, cause there's an assload of other creatures, and a good bit of them have only limited use for your fortress.

I tend to find more interesting creatures (and therefore embark in) in savage tropical shrublands, savage freshwater tropical swamps, savage tropical coniferous forests, and savage warm deserts.

[Evil the Cat]

Thanks again,

Though I have to ask, does that include similar biomes next to each other (like how you often get multiple seemingly identical jungle biomes forming a single huge jungle) or does it only work if the biomes are different?

And Naryar. I'm in the process of generating a really savage high temperature world for that very reason.

[Sphalerite]

I am fairly certain that if you embark across two biomes of the same type, you still get the combined populations of both.  This was how I set up a sea serpent breeding fort a few versions back, I found an embark site that included two savage ocean biomes and was able to capture two sea serpents, which appear at most one per biome.

FYI, here's a complete per-biome wild animal population list in the current revision.  I'm fairly certain this is correct, but I may have made some mistakes figuring out how biome tags map to biomes.

Spoiler (click to show/hide)

Arctic ocean
   50% chance for 15-30 penguins in groups of 5-10
   50% chance for 15-30 emperor penguins in groups of 5-10
   50% chance for 15-30 little penguins in groups of 5-10
   50% chance for 15-30 cod in groups of 10-15
   50% chance for 15-30 conger eels
   50% chance for 15-30 halibut
   50% chance for 15-30 sturgeons
   50% chance for 25-50 bluefin tuna in groups of 10-15
   50% chance for 15-30 walruses in groups of 3-7
   50% chance for 15-30 whales in groups of 3-7
   if not benign: 50% chance for 15-30 sea lampreys
   if not benign: 50% chance for 15-30 blue sharks
   if not benign: 1% chance for 15-30 frill sharks
   if good: 10-20 merpeople in groups of 3-6
   if evil and not benign: 50% chance for 1 sea monster
   if savage: 50% chance for 1 sea serpent

Badlands
   15-30 one-humped camels in groups of 3-7
   15-30 two-humped camels in groups of 3-7
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 50% chance for 15-30 vultures in groups of 5-10
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if evil and not benign: 5% chance for 10-20 nightwings
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant desert scorpions in groups of 1-3

Glacier
   if not benign: 2% chance for 2-3 polar bears
   if evil and not benign: 5% chance for 5-10 blizzard men
   if evil and not benign: 10% chance for 10-20 ice wolves in groups of 3-7
   if savage: 1% chance for 5-10 yetis

Mangrove swamp
   50% chance for 15-30 ducks in groups of 1-4
   5% chance for 20-50 gorillas in groups of 5-10
   50% chance for 15-30 water buffalos in groups of 3-7
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 2-3 tigers
   if evil and not benign: 5% chance for 10-20 grimelings
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Mountain
   50% chance for 15-30 mountain goats in groups of 1-4
   50% chance for 15-30 hoary marmots in groups of 1-4
   50% chance for 15-30 yaks in groups of 3-7
   if good: 10% chance for 20-50 mountain gnomes in groups of 5-10
   if evil: 10% chance for 20-50 dark gnomes in groups of 5-10
   if savage: 50% chance for 15-30 giant eagles
   if savage: 1% chance for 5-10 yetis

Rocky wasteland
   15-30 one-humped camels in groups of 3-7
   15-30 two-humped camels in groups of 3-7
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 50% chance for 15-30 vultures in groups of 5-10
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if evil and not benign: 5% chance for 10-20 nightwings
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant desert scorpions in groups of 1-3

Sand desert
   15-30 one-humped camels in groups of 3-7
   15-30 two-humped camels in groups of 3-7
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 50% chance for 15-30 vultures in groups of 5-10
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if evil and not benign: 5% chance for 10-20 nightwings
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant desert scorpions in groups of 1-3

Subterranean chasm
   50% chance for 15-30 giant cave swallows
   50% chance for 20-40 bugbats in groups of 5-15
   50% chance for 15-30 dralthas in groups of 2-5
   50% chance for 25-50 elk birds in groups of 5-10
   15-30 naked mole dogs in groups of 5-10
   15-30 giant moles
   10-20 giant rats
   10-20 large rats
   50% chance for 15-30 rutherers in groups of 3-7
   if not benign: 30-50 antmen in groups of 5-10
   if not benign: 50% chance for 10-20 giant bats
   if not benign: 10% chance for 15-30 blind cave bears
   if not benign: 10% chance for 250-500 cave blobs in groups of 2-5
   if not benign: 10% chance for 30-50 cave floaters in groups of 1-3
   if not benign: 150-300 crundles in groups of 15-20
   if not benign: 10% chance for 20-50 drunians in groups of 5-10
   if not benign: 1% chance for 15-30 amethyst men
   if not benign: 1% chance for 15-30 gabbro men
   if not benign: 1% chance for 15-30 iron men
   if not benign: 10% chance for 250-500 floating guts
   if not benign: 20% chance for 15-30 giant earthworms
   if not benign: 10% chance for 10-20 green devourers
   if not benign: 50% chance for 1 gremlin
   if not benign: 30% chance for 10-25 helmet snakes
   if not benign: 50% chance for 100-200 hungry heads in groups of 5-10
   if not benign: 50% chance for 15-30 jabberers
   if not benign: 20% chance for 15-30 molemarians in groups of 1-3
   if not benign: 30-50 rodent men in groups of 5-10
   if not benign: 15-30 troglodytes in groups of 5-10
   if not benign: 50% chance for 10-20 voracious cave crawlers
   if good: 25% chance for 10-20 gorlaks
   if evil and not benign: 50% chance for 5-10 blind cave ogres in groups of 1-3
   if evil and not benign: 1% chance for 15-30 blood men in groups of 2-5
   if evil and not benign: 5% chance for 2-5 cave dragons
   if evil and not benign: 5% chance for 250-500 creeping eyes in groups of 10-20
   if evil and not benign: 10% chance for 20-30 maneras
   if evil and not benign: 50% chance for 10-15 reachers
   if evil and not benign: 50% chance for 5-10 trolls
   if savage: 20% chance for 3-4 giant cave spiders

Subterranean magma
   if not benign: 1% chance for 15-30 fire men
   if not benign: 1% chance for 15-30 magma men
   if not benign: 20% chance for 15-30 fire imps in groups of 3-4
   if not benign: 25-50 magma crabs in groups of 1-5

Subterranean water
   20% chance for 15-30 plump helmet men in groups of 3-5
   if not benign: 30-50 amphibian men in groups of 5-10
   if not benign: 10% chance for 250-500 cave blobs in groups of 2-5
   if not benign: 50% chance for 10-20 cave crocodiles
   if not benign: 150-300 crundles in groups of 15-20
   if not benign: 1% chance for 15-30 mud men
   if not benign: 10% chance for 250-500 flesh balls in groups of 2-5
   if not benign: 50% chance for 10-20 giant olms
   if not benign: 50% chance for 15-30 pond grabbers in groups of 3-5
   if not benign: 30-50 reptile men in groups of 5-10
   if not benign: 30-50 serpent men in groups of 5-10
   if not benign: 50% chance for 10-20 giant toads

Taiga
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 deer in groups of 1-4
   50% chance for 10-20 foxes
   50% chance for 15-30 moose
   50% chance for 15-30 reindeers in groups of 5-10
   if not benign: 5% chance for 2-3 black bears
   if not benign: 2% chance for 2-3 grizzly bears
   if not benign: 10% chance for 10-20 raccoons in groups of 1-3
   if not benign: 5% chance for 10-20 wolves in groups of 3-7
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 25% chance for 10-20 werewolves
   if savage: 1% chance for 5-10 sasquatches

Temperate brackish lake
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 longnose gars
   50% chance for 15-30 pike
   if not benign: 50% chance for 15-30 sea lampreys

Temperate brackish river
   50% chance for 15-30 longnose gars
   50% chance for 15-30 pike
   50% chance for 15-30 sturgeons
   10% chance for 15-30 platypuses
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 50% chance for 15-30 sea lampreys

Temperate broadleaf forest
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 turkeys in groups of 1-4
   50% chance for 15-30 deer in groups of 1-4
   50% chance for 10-20 foxes
   50% chance for 15-30 moose
   if not benign: 5% chance for 2-3 black bears
   if not benign: 2% chance for 2-3 grizzly bears
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 2-3 pandas
   if not benign: 10% chance for 10-20 raccoons in groups of 1-3
   if not benign: 5% chance for 10-20 wolves in groups of 3-7
   if good: 5% chance for 10-20 satyrs in groups of 3-5
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 5% chance for 10-20 foul blendecs in groups of 3-5
   if evil and not benign: 25% chance for 10-20 werewolves
   if savage: 1% chance for 5-10 sasquatches

Temperate coniferous forest
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 turkeys in groups of 1-4
   50% chance for 15-30 deer in groups of 1-4
   50% chance for 10-20 foxes
   50% chance for 15-30 moose
   if not benign: 5% chance for 2-3 black bears
   if not benign: 2% chance for 2-3 grizzly bears
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 2-3 pandas
   if not benign: 10% chance for 10-20 raccoons in groups of 1-3
   if not benign: 5% chance for 10-20 wolves in groups of 3-7
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 25% chance for 10-20 werewolves
   if savage: 1% chance for 5-10 sasquatches

Temperate freshwater lake
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 carp in groups of 5-10
   50% chance for 15-30 longnose gars
   50% chance for 15-30 pike
   if not benign: 50% chance for 15-30 sea lampreys
   if savage: 5% chance for 5-10 leechmen in groups of 2-5

Temperate freshwater marsh
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 geese in groups of 3-7
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if evil and not benign: 25% chance for 10-20 beak dogs in groups of 3-7
   if evil and not benign: 5% chance for 10-20 grimelings
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5

Temperate freshwater river
   50% chance for 15-30 carp in groups of 5-10
   50% chance for 15-30 longnose gars
   50% chance for 15-30 pike
   50% chance for 15-30 sturgeons
   10% chance for 15-30 platypuses
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 50% chance for 15-30 sea lampreys

Temperate freshwater swamp
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 turkeys in groups of 1-4
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if evil and not benign: 5% chance for 10-20 grimelings
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5

Temperate grassland
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 elk in groups of 3-7
   50% chance for 15-30 groundhogs in groups of 1-4
   50% chance for 15-30 horses in groups of 3-7
   50% chance for 15-30 muskoxen in groups of 3-7
   50% chance for 15-30 rabbits in groups of 1-4
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 10% chance for 20-50 rhesus macaques in groups of 5-10
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3

Temperate ocean
   50% chance for 15-30 bluefish in groups of 5-10
   50% chance for 15-30 cod in groups of 10-15
   50% chance for 15-30 conger eels
   50% chance for 15-30 halibut
   50% chance for 15-30 marlins
   50% chance for 15-30 opah
   50% chance for 15-30 common skates
   50% chance for 15-30 sturgeons
   50% chance for 15-30 ocean sunfish
   50% chance for 15-30 swordfish
   50% chance for 25-50 bluefin tuna in groups of 10-15
   50% chance for 15-30 angelsharks
   50% chance for 15-30 basking sharks
   50% chance for 15-30 nurse sharks
   50% chance for 15-30 spiny dogfish
   50% chance for 15-30 spotted wobbegongs
   50% chance for 15-30 whales in groups of 3-7
   if not benign: 50% chance for 15-30 sea lampreys
   if not benign: 50% chance for 15-30 blue sharks
   if not benign: 1% chance for 15-30 frill sharks
   if not benign: 50% chance for 15-30 great white sharks
   if not benign: 50% chance for 15-30 hammerhead sharks
   if not benign: 50% chance for 15-30 longfin mako sharks
   if not benign: 50% chance for 15-30 shortfin mako sharks
   if good: 10-20 merpeople in groups of 3-6
   if evil and not benign: 50% chance for 1 sea monster
   if savage: 50% chance for 1 sea serpent

Temperate saltwater lake
   50% chance for 15-30 ducks in groups of 1-4
   if not benign: 50% chance for 15-30 sea lampreys

Temperate saltwater marsh
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 geese in groups of 3-7
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if evil and not benign: 25% chance for 10-20 beak dogs in groups of 3-7
   if evil and not benign: 5% chance for 10-20 grimelings
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5

Temperate saltwater river
   50% chance for 15-30 sturgeons
   10% chance for 15-30 platypuses
   if not benign: 50% chance for 15-30 sea lampreys

Temperate saltwater swamp
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 turkeys in groups of 1-4
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if evil and not benign: 5% chance for 10-20 grimelings
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5

Temperate savanna
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 groundhogs in groups of 1-4
   50% chance for 15-30 horses in groups of 3-7
   50% chance for 15-30 rabbits in groups of 1-4
   if not benign: 50% chance for 15-30 buzzards in groups of 5-10
   if not benign: 10% chance for 20-50 rhesus macaques in groups of 5-10
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3

Temperate shrubland
   50% chance for 10-20 badgers in groups of 4-12
   50% chance for 15-30 turkeys in groups of 1-4
   50% chance for 15-30 groundhogs in groups of 1-4
   50% chance for 15-30 rabbits in groups of 1-4
   if not benign: 5% chance for 2-3 cougars
   if not benign: 10% chance for 20-50 rhesus macaques in groups of 5-10
   if not benign: 5% chance for 10-20 wolves in groups of 3-7
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3
   if evil and not benign: 25% chance for 10-20 werewolves

Tropical brackish lake
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 hippos in groups of 3-7

Tropical brackish river
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 hippos in groups of 3-7
   10% chance for 15-30 platypuses
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3

Tropical coniferous forest
   50% chance for 15-30 elephants in groups of 3-7
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 2-3 tigers
   if good: 5% chance for 10-20 satyrs in groups of 3-5
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 5% chance for 10-20 foul blendecs in groups of 3-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tropical dry broadleaf forest
   50% chance for 15-30 blue peafowls in groups of 1-4
   50% chance for 15-30 elephants in groups of 3-7
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 2-3 tigers
   if good: 5% chance for 10-20 satyrs in groups of 3-5
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 5% chance for 10-20 foul blendecs in groups of 3-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tropical freshwater lake
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 carp in groups of 5-10
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 tigerfish in groups of 3-7
   50% chance for 15-30 hippos in groups of 3-7
   if savage: 5% chance for 5-10 leechmen in groups of 2-5

Tropical freshwater river
   50% chance for 15-30 carp in groups of 5-10
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 tigerfish in groups of 3-7
   50% chance for 15-30 hippos in groups of 3-7
   10% chance for 15-30 platypuses
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3

Tropical freshwater swamp
   50% chance for 15-30 ducks in groups of 1-4
   5% chance for 20-50 gorillas in groups of 5-10
   50% chance for 15-30 water buffalos in groups of 3-7
   if not benign: 50% chance for 5-10 alligators in groups of 1-3
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 2-3 tigers
   if evil and not benign: 25% chance for 10-20 beak dogs in groups of 3-7
   if evil and not benign: 5% chance for 10-20 grimelings
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tropical grassland
   50% chance for 15-30 cavies in groups of 5-10
   50% chance for 15-30 gazelles in groups of 5-10
   50% chance for 15-30 rhinoceroses in groups of 3-7
   50% chance for 15-30 warthogs in groups of 3-7
   if not benign: 50% chance for 15-30 vultures in groups of 5-10
   if not benign: 5% chance for 5-10 cheetahs
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 5-10 lions in groups of 1-3
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3
   if savage: 5% chance for 5-10 giant cheetahs
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant lions in groups of 1-3

Tropical moist broadleaf forest
   50% chance for 15-30 blue peafowls in groups of 1-4
   5% chance for 20-50 bonobos in groups of 5-10
   5% chance for 20-50 chimpanzees in groups of 5-10
   50% chance for 15-30 elephants in groups of 3-7
   5% chance for 20-50 bilous in groups of 2
   5% chance for 20-50 black-crested gibbons in groups of 2
   5% chance for 20-50 black-handed gibbons in groups of 2
   5% chance for 20-50 gray gibbons in groups of 2
   5% chance for 20-50 pileated gibbons in groups of 2
   5% chance for 20-50 siamangs in groups of 5-10
   5% chance for 20-50 silvery gibbons in groups of 2
   5% chance for 20-50 white-browed gibbons in groups of 2
   5% chance for 20-50 white-handed gibbons in groups of 2
   5% chance for 20-50 gorillas in groups of 5-10
   5% chance for 20-50 orangutans
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 10% chance for 20-50 mandrills in groups of 5-10
   if not benign: 5% chance for 2-3 tigers
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 5% chance for 10-20 stranglers in groups of 1-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tropical ocean
   50% chance for 15-30 great barracudas in groups of 1-3
   50% chance for 15-30 bluefish in groups of 5-10
   50% chance for 15-30 coelacanth
   50% chance for 15-30 giant groupers
   50% chance for 15-30 marlins
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 opah
   50% chance for 15-30 manta rays
   50% chance for 15-30 common skates
   50% chance for 15-30 stingrays
   50% chance for 15-30 ocean sunfish
   50% chance for 15-30 swordfish
   50% chance for 25-50 bluefin tuna in groups of 10-15
   50% chance for 15-30 angelsharks
   50% chance for 15-30 whitetip reef sharks
   50% chance for 15-30 spiny dogfish
   50% chance for 15-30 whale sharks
   50% chance for 15-30 spotted wobbegongs
   50% chance for 15-30 whales in groups of 3-7
   if not benign: 50% chance for 15-30 blue sharks
   if not benign: 50% chance for 15-30 bull sharks
   if not benign: 1% chance for 15-30 frill sharks
   if not benign: 50% chance for 15-30 great white sharks
   if not benign: 50% chance for 15-30 hammerhead sharks
   if not benign: 50% chance for 15-30 longfin mako sharks
   if not benign: 50% chance for 15-30 shortfin mako sharks
   if not benign: 50% chance for 15-30 blacktip reef sharks
   if not benign: 50% chance for 15-30 tiger sharks
   if good: 10-20 merpeople in groups of 3-6
   if evil and not benign: 50% chance for 1 sea monster
   if savage: 50% chance for 1 sea serpent

Tropical saltwater lake
   50% chance for 15-30 ducks in groups of 1-4
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 hippos in groups of 3-7

Tropical saltwater river
   50% chance for 15-30 milkfish in groups of 3-7
   50% chance for 15-30 stingrays
   50% chance for 15-30 hippos in groups of 3-7
   10% chance for 15-30 platypuses
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3

Tropical saltwater swamp
   50% chance for 15-30 ducks in groups of 1-4
   5% chance for 20-50 gorillas in groups of 5-10
   50% chance for 15-30 water buffalos in groups of 3-7
   if not benign: 50% chance for 20-30 capybaras in groups of 5-10
   if not benign: 5% chance for 5-10 saltwater crocodiles in groups of 1-3
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 2-3 tigers
   if evil and not benign: 25% chance for 10-20 beak dogs in groups of 3-7
   if evil and not benign: 5% chance for 10-20 grimelings
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if savage: 5% chance for 5-10 slugmen in groups of 2-5
   if savage: 5% chance for 5-10 snailmen in groups of 2-5
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tropical savanna
   50% chance for 15-30 cavies in groups of 5-10
   50% chance for 15-30 gazelles in groups of 5-10
   50% chance for 15-30 giraffes in groups of 3-7
   50% chance for 15-30 rhinoceroses in groups of 3-7
   50% chance for 15-30 warthogs in groups of 3-7
   if not benign: 50% chance for 15-30 vultures in groups of 5-10
   if not benign: 5% chance for 5-10 cheetahs
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 5-10 lions in groups of 1-3
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3
   if savage: 5% chance for 5-10 giant cheetahs
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant lions in groups of 1-3

Tropical shrubland
   5% chance for 20-50 bonobos in groups of 5-10
   50% chance for 15-30 cavies in groups of 5-10
   5% chance for 20-50 chimpanzees in groups of 5-10
   50% chance for 15-30 elephants in groups of 3-7
   50% chance for 15-30 giraffes in groups of 3-7
   50% chance for 15-30 rhinoceroses in groups of 3-7
   50% chance for 15-30 warthogs in groups of 3-7
   if not benign: 5% chance for 5-10 cheetahs
   if not benign: 5% chance for 2-3 cougars
   if not benign: 50% chance for 10-20 honey badgers
   if not benign: 5% chance for 2-3 jaguars
   if not benign: 5% chance for 2-3 leopards
   if not benign: 5% chance for 5-10 lions in groups of 1-3
   if not benign: 5% chance for 2-3 tigers
   if good: 50% chance for 15-30 unicorns in groups of 3-7
   if evil and not benign: 25% chance for 10-20 harpies in groups of 2-3
   if evil and not benign: 50% chance for 5-10 ogres in groups of 1-3
   if savage: 5% chance for 5-10 giant cheetahs
   if savage: 5% chance for 2-3 giant jaguars
   if savage: 5% chance for 2-3 giant leopards
   if savage: 5% chance for 5-10 giant lions in groups of 1-3
   if savage: 5% chance for 5-10 tigermen in groups of 1-4
   if savage: 5% chance for 2-3 giant tigers

Tundra
   50% chance for 15-30 elk in groups of 3-7
   50% chance for 15-30 muskoxen in groups of 3-7
   50% chance for 15-30 reindeers in groups of 5-10
   if not benign: 2% chance for 2-3 polar bears
   if not benign: 5% chance for 10-20 wolves in groups of 3-7
   if evil and not benign: 5% chance for 5-10 blizzard men
   if evil and not benign: 25% chance for 10-20 werewolves
   if evil and not benign: 10% chance for 10-20 ice wolves in groups of 3-7
   if savage: 1% chance for 5-10 yetis

Note - this list only includes non-vermin creatures that wander - that is, they can appear and disappear on the map edge.  It doesn't include creatures that may be permanent residents of your site, or vermin creatures of any kind.

[Evil the Cat]

Wow, that's an amazing resource. Thanks so much for wheeling that out.

Very interesting stats. I always figured giant eagles were too rare to bother trying to capture, but looking at those stats I'm tempted to try a savage mountain fort and try to breed some eagles.

[evileeyore]

I am fairly certain that if you embark across two biomes of the same type, you still get the combined populations of both.  This was how I set up a sea serpent breeding fort a few versions back, I found an embark site that included two savage ocean biomes and was able to capture two sea serpents, which appear at most one per biome.

Yup, each individual biome gets it's owm population.

[Saiko Kila]

That list is really interesting. And it is consistent with my embarks - for instance I have tropical dry broadleaf forest and get elephants, peafowl, elephants, peafowl, elephant, peafowl... Other animals are occasionally present, but disappear quickly, and may appear several years later or never. Though just after embark I get random but associated animals which are not present on the list: in first embark I had hippos, who were slowly migrating away, in reclaim I had crocodiles, and so on.

[GenericOverusedName]

Holy carp, THANK YOU for compiling all that information. The wiki is incomplete, and it is very frustrating when you want to get some specific animals for a WarCheetahExplosion project or something like that.