There is quite an artistic range in the Quezacoatl I see: - 2 or 4 Wings - Legs or no Legs - Snake head or Dragon Head - Spiky tail or feathered tail ... In the Quetzal not so much Grrr, Imrahil
Been finding a lot of neat images from Mayakan recently: Carving a stela at Copan Tulum: Part of a Mayan Codex, refurbished. Paris codex I think?
Some interesting articles on Mayan Reservoirs and water control, specifically in the city of Tikal This had a big impact on their ability to grow enormous populations within their cities. Side View: Some articles: Sci News- Largest Ancient Mayan Dam found in Guatemala (2012) Penn Museum- Marvel of Maya Engineering: Water Management at Tikal (2012) PNAS- Water and sustainable land use at the ancient tropical city of Tikal, Guatemala (2012)
Three very similar Mayan glyphs (link): Each of these items tended to use jaguar skins in order to make/cover them.