What does "quesal" mean?

Quesal: The long-tailed, or resplendent, trogon (Pharomachus mocinno, formerly Trogon resplendens), native of Southern Mexico and Central America. Called alsoquetzal, and golden trogon. Note: The male is remarkable for the brilliant metallic green and gold colors of his plumage, and for his extremely long plumes, which often exceed three feet in length.