2, see text The topazes are two species of hummingbirds in the genus Topaza.
Males have a total length of about 22 cm (8+3⁄4 in), although this includes their elongated rectrices.
They are colourful, being mainly strongly iridescent golden and crimson with a black hood and a green throat.
Females lack the elongated rectrices and have a mainly green plumage.
[4] Although generally considered to be distinct species, they have in the past been thought to be conspecific by some authors.