Guatemalan quetzal 5, 10, 20 and 100 quetzales, with quetzal notes added in 1933. In 1946, the Bank of Guatemala took over the issuance of paper money, with its first issues being overprints on notes of the Central Bank. Except for the introduction of 50 quetzales notes in 1967, the denominations of banknotes were unchanged until and 1 quetzal coins replaced notes at the end of the 1990s. In the top-right corner of the obverse face of each banknote, the value is displayed in Mayan numerals, representing Guatemala's cultural history. The Bank of Guatemala has introduced a polymer banknote of 1 quetzal
Quetzal parts of the females' plumage are brown or grey. These largely solitary birds feed on fruits, berries, insects and small vertebrates (such as frogs). Even with their famous bright plumage, they can be hard to see in their natural wooded habitats. None of the many quetzal species are under immediate threat in the wild, although the eared and resplendent quetzal are at the Near Threatened status. The remaining are not considered threatened by the IUCN and all are locally common. The name "quetzal" is from Nahuatl , "large brilliant tail feather" ("American Audubon Dictionary") or "tail coverts of the quetzal"