Crimson Topaz

Identificazione

The male crimson topaz is 21 to 23 cm (8.3 to 9.1 in) long including the 5 cm (2.0 in) bill and 8.6 to 12 cm (3.4 to 4.7 in) tail, and weighs 11 to 18 g (0.39 to 0.63 oz). Females are 13 to 14 cm (5.1 to 5.5 in) long and weigh 9 to 12.5 g (0.32 to 0.44 oz). It may be the second largest species of hummingbird after the giant hummingbird, rivaled only by its cousin, the fiery topaz.<p>Male and female crimson topaz have different plumages. Both have a straight to slightly decurved bill. The male's head, face, and the sides of the neck are velvety black. Its back is iridescent crimson to gold on the uppertail coverts. The central tail feathers are bronzy green and the outer ones chestnut; two of the latter are elongated and crossed. The throat is golden green surrounded by a black band and the underparts bright red. The wings are brown. The female's head and back are dark green and its underparts a lighter green with golden green inclusions; the throat is green with crimson inclusions. The central tail feathers are bronzy, the middle pair violet, and the outer pair chestnut, and none are elongated like the male's.

Tassonomia

The crimson topaz was formally described by the Swedish naturalist Carl Linnaeus in 1758 in the tenth edition of his Systema Naturae under the binomial name Trochilus pella. Linnaeus based his description on the "Long-tail'd red huming-bird" that had been described and illustrated by the English naturalist George Edwards in 1743 from a specimen owned by Charles Lennox, the Duke of Richmond. The specimen had been collected in Suriname. The specific epithet is from the Latin pellus meaning "dark-colored". The crimson topaz is now placed in the genus Topaza that was introduced by George Robert Gray in 1840 with the crimson topaz as the type species.<p>Three subspecies are recognised:<p>The crimson topaz has been treated as conspecific with the fiery topaz (T. pyra) but currently (2021) the two are considered to form a superspecies.

Nome scientifico

Topaza pella

Autorità

(Linnaeus, 1758)

Ordine

Apodiformi

Famiglia

Trochilidae

Genere

Topaza

Areale e habitat

The subspecies of crimson topaz are distributed thus:<p>The species mainly inhabits inland rainforest in lowlands and foothills at elevations up to 500 m (1,600 ft). It frequents granite outcrops and also gallery forest along small waterways.

Migrazione

Specie stanziale

Comportamento

Comportamento migratorio: Specie stanziale.

Conservazione

Tendenza della popolazione: in diminuzione.

Tendenza della popolazione

in diminuzione