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
Golden-headed quetzal in reference to the impressive tail of the resplendent quetzal. Two subspecies are recognized, "P. a. auriceps" (Gould, 1842) and "P. a. hargitti" (Oustalet, 1891). The species name, "auriceps", comes from Latin "aurum" meaning "gold" and "ceps" meaning "crowned" or "headed", in reference to the golden head of "Pharomachrus auriceps." The golden-headed quetzal weighs between 154-182g. It has a wingspan of 30–36 cm and a length of 33–36 cm with tail plumes adding another 8–10 cm. Like other members of the genus "Pharomachrus", the golden-headed quetzal is known for its iridescent golden-green wings and breast, which can appear blue depending