gonna paste the idea I tossed up just as a interest check kinda thing:
Based off Amazonian Tribes:
Thunderlands is home to primarily carnivores, but take care in assuring thier herbivore and omnivore members are well fed as well through the harvesting of wild fruits and farming of both fruits, veggies and medicinal plants made available by the forest. They utilize what thier territory has to offer in the highest regard. Huts are built from the wood and leaves the forest drops, and the larger the hut, the higher the status symbol. The woman of the tribe are often decorated by preserved jungle flowers whereas the men usually are found to be decorated with various leaves and vines. Those that do not identify along either gender can ususlly ne found sporting nothing at all, or a mix or flowers and leaves. Children are usually painted with inks made from fruits and thier seeds, and while some families may mark thier children with a special symbol, the primary purpose is to awknowledge the child as a young Thunderlands member that has not yet gone through thier "growth" ceremony. The leader and other high positions are usually found decorated with dropped feathers offered by the colorful parrots of the forest. The larger the headdress, the higher the status. Usually headdresses are only worn during war, ceremonies, meetings, high position gatherings and other important events where thier status should be made clear.
Ceremonies are held for children coming-of-age, marraiges, funerals, and of course warriors who prove thier worth in battle.
The Growth Ceremony - The growth ceremony occurs at 12 months old. Children are celebrated as they complete thier basic training, and become warriors of the tribe. The ceremony features a "crowning", which is the act of giving a child growing to warrior a symbolic ink on thier flank, a small feast for the family and friends hosted by the parents of the child or the child themselves, and then of course, the warriors test. The child is sent to fend for themselves for 3 days in unclaimed jungle territory, supplied only with medicine and minimal food for the venture to thier destination. How they return usually dictates thier future. Warriors that return with signs of battle are said to be more prone to do best in the battlefield. Warriors that return unscathed are said to be more prone to do best with politics and spy work. Those that return with signs of self-healing are said to be best in the medicine field. Variations occur and may identify various strengths versus a singular strength. A warrior that returns with battke wounds, healing and a new sense of wisdom are said to be ideal leaders, mastering all three elements of the test.
Marriages -
A marraige is usually a clan event. Everyone is invited to dine before the leaders hut, and the center of their tribe is decorated heavily. Usually the healer of the tribe performs the ceremony, and the leader attends as a primary witness to the marraige. It is said that the marraige is sent to the heavens through the burning of two sacred objects to each partaking in the wedding. If the spirits accept the wedding, it is told that the burning will go without a problem. However, if the spirits deny the marraige, the objects will refuse to burn. Refusal of marraige results in the partnership being unrecognized by the clan, and any children beared from the pair (be it before or after) are deemed un-spiritual beings and are usually "cleansed" through the burning of various demon-banishing herbs soon after.
Funerals -
Funerals are treated as a celebration of ones life. A large raft is built and burnt in a body of water, while the clan watches and mourns durong the burning. Afterwards, families spend quality time together and are encouraged to express care and share stories of the deceased.
The Warriors Ceremony -
A warrior that proves thier worth in battle is typically rewarded with a small feather, only to be worn during battle as a sign that they are a prized warrior and one to fear. This is usually a clan event, done at meetings, as a sign of thier new title.
Religion -
Whole religion is loose, it exists. The tribe believes that the beings that has formerly walked the earth continue to take up a life on the territory. They are rarely seen, but when one is seen, one is always recommended to follow it. It is said that after seeing and following a spirit, a prophecy or new grand power can be revealed. Or, if you are unlucky, you will find death and devastation.
Leaders Ceremony -
Whenever a new leader is elected, the clan hosts a grand celebration for themselves and allies. Beforehand, the clan goes on a celebratory hunt to bring down the biggest prey they can find. During the feast, this prey is served. All attendees are asked to bring a feather from a bird, and a headdress base is passed around for each feather to be attached. Once the headdress is completed, the leader accepts thier headdress and the feast begins.
War Paint -
War paint is used to identify Thunderlandic warriors so that no accidental "friendly-fire" occurs. War paint is used woth various colors made from druits and seeds. Each leader has thier own "warriors mark" which is a painted symbol typically on the forehead of thier warriors, designed by the leader themselves. More decorated warriors can be found sporting smaller feathers during battle to assert thier skill and for some, thier rank.