Deer
Deer comprise a family of hoofed ruminant mammals found widely across the world.
#Human relations
People of the Fifth World hunt deer for their meat (venison), skins (useful in making soft clothing), and antlers (often used as knife handles).
#Specialization
A community specializing in relationship with deer more likely than not live in nomadic hunter-gatherer bands, following herds of deer as they migrate throughout the year. They may live in more marginal lands that make horticulture impractical, such as rocky, hilly regions or areas close to the poles that lay under ice or permafrost until relatively recently.
If the community lives in a more lush environment, they may practice controlled burns of portions of forest in order to create open, grassy habitats for the deer. They may think of this as payment in exchange for the deer their hunters take for food.
The responsibilities of the community's wizard will likely include negotiating with the Keeper of the Game for how many deer the community can take per year. If they take even one more than the agreed-upon number, the Keeper of the Game will demand a steep price -- or even a sacrifice.
A community that defines itself partly by its relationship with deer will inevitably define itself by hunting. They will take seriously their responsibility towards the animals they hunt. They will have strict rules about how many deer they may take in a given season (see above) and which deer specifically they may take. This will almost certainly take the form of the "conversation of death" -- the hunter will notice which deer has volunteered to sacrifice henself, and only hunt that one (though the deer, once singling henself out, will likely require the hunter to earn that sacrifice with a chase). This community may have purification rituals around hunting, such as abstaining from sex for a certain period of time before going on a hunt, to avoid offending the deer.
Of course, a community specializing in relationship with deer will responsibly make use of the bodies of the animals they hunt. Other communities may know them for their deerskin clothing and shoes, or crafts made of antler-bone. They may have a particular talent for brain-tanning and making beautiful clothes out of deerskin. They may even live in collapsible, portable houses of deerskin (or at least drape deerskins over houses made of the skins of larger animals).
#Deer Clans
Some communities that have clan systems include Deer Clans. Members of Deer Clan consider deer kin, and eating venison cannibalism. This can make things quite difficult in communities that hunt deer. People generally associate Deer Clan with gentleness and self-sacrifice.