I have another contestant for a Native American Civilization, from Central America, if you wish to know...
Arawak Civilization
Arawak Leader: Agueybana
Leader Ability: Paradise Islands
Rainforest Tiles adjacent to Coastal Tiles gain +2 Gold with at least 2 adjacent Coastal Tiles and scales with technologies and civics for more Food, Gold and Culture, Coastal Tiles adjacent to Rainforest Tiles gain +2 Food with at least 2 adjacent Rainforest Tiles and scales with technologies and civics for more Food, Gold and Culture (Lake Tiles doesn’t count for this Ability as Coastal Tiles)
Leader Agenda: Guardian of Paradise
Likes leaders who keeps Rainforest preserved and who keeps Global Warming at lowest levels, Hates leaders who chopped all Rainforest from their lands and who raises Global Warming into higher levels
Civ. Ability: Curare Handling
Ranged and Recon Class Units has +5 Attack Strength against Wounded Units, and earn 50% of Defeated Unit Strength as Culture on Kill (other Class Units have no bonuses)
Civ. Unique Unit: Blowgunner
Replaces Slinger, has +15 Attack Strength against Melee and Anti-Cavalry Class Units, Upgrades directly into Crossbowman instead of Archer, Arawak civilization starts with a Blowgunner instead of Warrior
Civ. Unique Improvement: Slash and Burn Farm
Available at Irrigation Technology, it is similar to Farm without replacing it, produces +1 Food like a Farm and also produces +1 Hammer, +1 Food with 2 adjacent Coastal Tiles at Feudalism, +1 Hammer with 2 adjacent Slash and Burn Farms at Feudalism, +1 Food per adjacent Coastal Tile at Replaceable Parts, +1 Hammer per adjacent Slash and Burn Farm at Replaceable Parts, can only be placed in a Rainforest tile, doesn’t remove Rainforest feacture when built (Lake Tiles doesn't count for this Improvement as Coastal Tiles)
Civ. Start Bias: Coastal (Tile), Rainforest (Tile)
References
https://en.wikipedia.org/wiki/Agüeybaná_II
https://en.wikipedia.org/wiki/Taíno
https://en.wikipedia.org/wiki/Terra_preta