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A couatl resembled a long, feathered serpent with a pair of rainbow-feathered wings that allowed it to fly. They were around 12 feet (3.5 meters) in length, with a wingspan of 15 feet (4.5 meters). They weighed around 1,800 pounds (882 kilograms).
Couatls live solitary lives, in pairs, or in flights of 3–6 individuals. Their intellect was above that of most humans, and, although they did not use weapons and armor as a human might, they often owned treasure. They typically spoke Common, Draconic, and Celestial.
Couatls were known for their beauty, magic, and virtue. Due to their intelligence and devotion to good, they were sometimes worshiped by people who inhabited the same area as them.
The couatl were originally sarrukh from Okoth who, when they realized that their empire was failing, fled to the other planes of existence. They never found a plane that they were willing to live in for more than a generation, so they became nomads, traveling from plane to plane. This life hardened most of the sarrukh, leading them into evil. A few dissenters broke off from their evil peers and entreated Jazirian, a fragment of the World Serpent, for succor, who responded by turning them into their present forms. The rest of the Okothian sarrukh declared war on their transformed former brethren but the couatl held their own, despite the sarrukh's advantage of greater numbers. This continued until Jazirian was slain by Merrshaulk, a darker fragment of the World Serpent. This forced the couatl to flee back to Abeir-Toril. They arrived in Maztica, where most remained.
Couatls became the favored beings and signs of the god Qotal. When he left the True World, he made a prophecy that a couatl would one day appear and be greeted by his chosen daughter. This would be the first sign of the god's return to his people.
- Eku, a couatl who offered her services as a guide in Port Nyanzaru, disguised as a middle-aged Chultan woman.
- Chitikas was a couatl servant of Qotal who granted Erixitl the ability to speak to common and guided her during the times of need. 
- Gary Gygax (December 1977). Monster Manual, 1st edition. (TSR, Inc). ISBN 0-9356-9600-8.
- Carl Sargent (May 1992). Monster Mythology. (TSR, Inc). ISBN 1-5607-6362-0.
- Skip Williams, Jonathan Tweet, Monte Cook (July 2003). Monster Manual 3.5. (Wizards of the Coast). ISBN 0-7869-2893-X.
- ↑ 1.0 1.1 1.2 1.3 1.4 Doug Stewart (June 1993). Monstrous Manual. (TSR, Inc), p. 46. ISBN 1-5607-6619-0.
- ↑ 2.0 2.1 2.2 2.3 Wizards RPG Team (2014). Monster Manual 5th edition. (Wizards of the Coast), p. 43. ISBN 978-0786965614.
- ↑ Rob Heinsoo, Stephen Schubert (May 19, 2009). Monster Manual 2 4th edition. (Wizards of the Coast), pp. 38–39. ISBN 0786995101.
- ↑ 4.0 4.1 4.2 4.3 Skip Williams, Jonathan Tweet, Monte Cook (July 2003). Monster Manual 3.5. (Wizards of the Coast), pp. 37–38. ISBN 0-7869-2893-X.
- ↑ Bruce R. Cordell (April 2004). Expanded Psionics Handbook. (Wizards of the Coast), p. 193. ISBN 0-7869-3301-1.
- ↑ Gary Gygax (December 1977). Monster Manual, 1st edition. (TSR, Inc), p. 15. ISBN 0-9356-9600-8.
- ↑ Carl Sargent (May 1992). Monster Mythology. (TSR, Inc), p. 89. ISBN 1-5607-6362-0.
- ↑ 8.0 8.1 Frank Mentzer (January 1985). “Ay pronunseeAYshun gyd”. In Kim Mohan ed. Dragon #93 (TSR, Inc.), p. 26.
- ↑ 9.0 9.1 Skip Williams, Jonathan Tweet, Monte Cook (July 2003). Monster Manual 3.5. (Wizards of the Coast), p. 37. ISBN 0-7869-2893-X.
- ↑ Jonathan Tweet, Monte Cook, Skip Williams (July 2003). Player's Handbook 3.5 edition. (Wizards of the Coast), p. 287. ISBN 0-7869-2886-7.
- ↑ Boxed set: product required
- ↑ Christopher Perkins, Will Doyle, Steve Winter (September 19, 2017). Tomb of Annihilation. Edited by Michele Carter, Scott Fitzgerald Gray. (Wizards of the Coast), p. 34. ISBN 978-0-7869-6610-3.
- ↑ Douglas Niles (1990). Ironhelm. (TSR, Inc). ISBN 0-8803-8903-6.
(any good alignment)
Asura • Bariaur • Couatl • Einheriar • Foo creature (Foo dog • Foo lion) • Hollyphant • Ki-rin • Lillend • Moon dog • Pegasus • Shirokinukatsukami • Unicorn (Celestial charger)
Aasimar (Deva) • Half-celestial