Salem

Albino Animal Variants - I think it would be a cool extra incentive for explorers and long distance travelers.

Albino Deer, Bears, Beavers, Cougars. Very small chance of spawning. They would be exactly the same except gives Albino Hide instead.

Capes: Using 1x Dried Albino Hide in a recipe creates the Albino version of that cape, which is just a new texture and +1 slots. So if you have 3x Dried Bear Hide and 1x Dried Albino Bear Hide and you clicked the Bear Cape recipe it would create an Albino Bear Cape with 4 slots instead of 3.

Etc: Patchwork Pocket Recipe using an albino hide Ghost Pocket with +2 pockets for any pants. Albino Deerskin Inlays +25 Affluence, +11 CCD, +12 Soil Digging.

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Animal Magnetism - a suggestion to reduce the grind slightly of collecting wild animal drops for high-end players

High level skill which allows building of Animal Dens, aka spawn points for wild kritters.

Viper Pit
30 Gneiss
20 Granite
10 Smooth Stone
1x Etterfang/Snake Skull

Rabbit Burrow
20 Thorns
10 Carrot
5 Grimtooth
1x Jackalope Antlers/Beaming Proud Sunflower

Beaver Dam
70 Branches
20 Woodblocks
20 Clay
1x Beaver Tooth/Lillypad
Must be built on shallow water

Deer Nest
100 Autumn Grass
50 Autumn Leaves
5 Perfect Autumn Leaf
1x ???/???

Bear Cave
100 Any Stone
50 Granite
1x Bear Heart/Bear Claw
Must be built on mine node

Additional Info: Could have a build radius if too OP. Possibly could have a small inventory which spawns items related to that creature, 98% useless but every now and then something nice, the catch is the invetory is small and fills up quick so to get anything good you'd have to stay on top of it, cleaning it out.

Animal spawns sound like a terrible idea. Stop being lazy

I like all of that.

On the Cape though I feel like it would be a bit too OP unless the albinos of higher end creatures are very very rare.
Also +2 pockets would be OP for the Patchwork Pocket recipe. The simple fact that it's a different recipe would allow you to put one more slot using another artifice.

AS for the dens that would be awesome but could potentially lead to abuse with the bear cave. I instantly thought that you could make bear turrets in the outskirts of your base so the bears spawning inside would aggro people and perma roar them.
I guess the fact that it must be built on a mine node would limit it's usefulness somewhat.

also note:

id like a animal storage building or special mine/underground building to store animal carcasses.

Dens should not act as spawn points but maybe could increase the chance of the animal spawning on that map tile.