Suggestions wanted: Animals!

[Boston]

Goats and sheep:

Probably the most useful and most "logistics-friendly" an animal a colonist could have. Goats and sheep provide meat, milk, leather and hair (which would essentially be wool. I don't know about you, but I wouldn't want to be wearing cotton in Autumn and Winter, even in a Temperate Biome!)

[FridayBiology]

termites / underground soil improving animal (biological terraforming aid) - only available within mountains. Orginally deployed on world pre-arrival by exploration team so that follow up teams could greater grow organic matter by improving soil conditions.

Postosuchus (Large Slow moving predator) - using genetic material humans
reproduced large meat eater animals to maintain assisting biological components by  consuming sick or old components. Postosuchus_s keeps local environment stable by reducing herbivore impact on plants, as well as removal of decaying matter through consumption and excession. https://en.wikipedia.org/wiki/Postosuchus
Being slow moving and semi-cold blooded (maybe) they'd be inactive in cold climates
> require cold climate animal. small animals die off at -5 to -20'C so what we need large hairy Yak-like beastie to move over large territory (consuming prey from one area kills off prey over long term reducing survival). enters and exits map every now and then, could code so that colonist alerts only when colonist sights/hears beastie, to reduce killing it before its "found" colony.

+1 Crabs for coastal.
> Could add a coastal event "night of the crabs" (novel by Guy N. Smith )
> crabs come up from the deep water to spawn eggs within shallows
> environmental Rimworld event rather then threat to colony :3

+ 1 Crocodile
> a few of us attempted to add a ambush predator earlier though no luck with coding.

Bird of some kind, perhaps
> black-bird - consumes rotting flesh as well as stabilizing environment by scattering bones of said corpses so that they degrade faster. non-threatening in small numbers.
> willy-wagtail - consumes berrys from bushes as well as damages colony fruit. Small non-threatening. Could be a terraforming aid as they'd assist the spreading of introduced plant species.

[Jorlem]

Any chance for boomwargs?

[caesius]

humans have beed suffered from rats. Which eat off precious foods and bring some horrable plagues. RATs would be great animals which can give some challenges for users.

White ant also can be good animal. They eat off wooden stuffs, making structures collapse, danaging any wooden stuffs.

BIIIIG COCKROACH would be great too. COCKROACHs are good sources of protein. (Did you see the movie "snow piearcer"? If dont, try it.)

[b0rsuk]

Animals which are everywhere ... insects.

Insects can be modelled as swarms at best. You won't live long enough to see individual insects modelled in Rimworld. Computers don't have enough computing power, and insects are vastly more numerous than all other kinds of animals combined.

[AllenWL]

White ant also can be good animal. They eat off wooden stuffs, making structures collapse, danaging any wooden stuffs.

I think you mean termite.

Anyhow, other then insect swarms, we could also have supersized insects. I think it'll work fine.

[giannikampa]

The Flesh Eater Worm: a monster inspired from dune series.
It's a worm that lives underground (so it is invisible most of the time) then, as an event, comes out from underground at the position of a random corpse or eventually a living persons/animals. Emerging has an animation (like dust rumbling). During the emerging time the monster is already vulnerable and can be dissuaded from coming out by shooting at it. The time it takes to emerge depends on the floor kind: no floor means few seconds, other floors are stronger and extend the duration of emerging, so there will be more time for the colonists to run away from the incoming attack and shoot from a safe distance.
Once emerged only mouth of the beast is visible and it can't move but has a strong melee damage (so stay away!), it bites its pray and keeps it restrained gradually hurting it/him/her and takes a reasonable time to gobble (and kill if alive).
If attacked, after some damage (1000 hit point?) it does not dies but just release its pray and burrows/disappears from sight.
If not wounded, the F.E.W. just eats its pray and disappears.
Respawning will depend on the damage it took on previous attak.

Side thing could be a new electronic device that produces waves and avoids the worm from spawning in its area of effect.

[b0rsuk]

• Tunnel worms: Can tunnel through walls (perhaps damaging the wall, perhaps not). They appear at the deepest points in the colony, in mountain maps only. They appear with a worm hive, which slowly spawns additional worms. They defend their hive.

Got one that's straightforward but interesting? Please contribute. Bonus points if it ties in with existing systems. Simple animals without exotic behaviors are also good.

To make them more charming, what if they drag downed colonists to their hive, inject with anaesthetic, and - if he's not rescued within one day - feed him to the larva ?

[VortecusMaximus]

These animals would be amazing additions.

Crocodiles - They roam marshy maps and maybe often jungle maps, they can swim in shallow water and if small critters come too close to the waters edge they're eaten.
Frogs/Toads - Spawn in marsh/swamp biomes and hop around the place eating visible insects that should roam the map.
Crabs - They only spawn on coastal maps and stay only on the beach, very tasty but can take quite a punch if being melee attacked.
Some species of birds - Like crows, that land on your crop fields or near wild berry bushes and eat the fruits/vegetables until they're scared off, full, or killed by colonists or predators. This could also make scarecrows a new build-able structure using grown hay or picked long grass? Maybe vultures that live in deserts and feed on corpses of animals or humans.

[TheDirge]

Panda bears, giant coconut crabs (yes that's a thing), land-based mantis shrimps!

and star nosed moles!

[RemingtonRyder]

Um, I don't have a particular animal to suggest, but I wondered if possibly the spawn rate of predators could be limited by the prey that is available. Like the ecosystem weight in XML, but for carnivores.

[Mr.Cross]

That would be nice, at least then you wouldn't have a map full of rampaging carnivores decimating them selves before turning to the only other food source. Your colonists.

[LouisTBR]

 
Finally, Wargs are annoying. Correct? So, once you have lived through the hassle of having them yapping (and biting) at your heels, you could incapacitate them and take them as (essentially) a prisoner. Then, from there, they could go through the same process as a human prisoner, except, once 'recruited', they could be used as a defence against raiders and wild Wargs, but not mechs, because that would be utterly stupid and useless. If you incorporate other people's animal suggestions, you could categorise them into one of these three groups. Oh, and maybe add in some sort of cage/pen to keep them inside.

From Louis   

[Adamiks]

Sheeps - for clothes production.
Cows - for milk.
Dogs - they should help colonists in hunting, fighting etc.
Cats - animal from traders, just a "decoration" that can give extra mood and joy source.
Bats - they could live in free spaces in mountains
Rats - they should make - debuff to colonists, eat food in fridges, destroy power cables etc. i think there should be another kind of rats - pets. You know, a lot of people like rats.
Hamsters - like above.
Bears - dangerous etc.
Birds - if you could make them in Rimworld. I don't think so though.
Frogs
Fishes?
Penguins! Yes!!!
Big worms - would make mountains less OP
Horses
Dolphins
Gorrilas

I would like to see some animals that don't live on Earth, but it's up to you, because i don't have a idea.

[b0rsuk]

Cats - animal from traders, just a "decoration" that can give extra mood and joy source.
(...)
Rats - they should make - debuff to colonists, eat food in fridges, destroy power cables etc. i think there should

Add two and two together. Maybe you'll find another use for cats.

By the way, people ate cat pâtés in medieval ages.