| Golden-crowned emerald | |
|---|---|
 | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Apodiformes |
| Family: | Trochilidae |
| Genus: | Cynanthus |
| Species: | C. auriceps |
| Binomial name | |
| Cynanthus auriceps (Gould, 1852) | |
| Synonyms | |
Trochilus auriceps; Chlorostilbon auriceps | |
The golden-crowned emerald (Cynanthus auriceps) is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to western Mexico. [3] [4]
The golden-crowned emerald was originally described in genus Trochilus. Since then it has variously been classified as a subspecies of what is now Canivet's emerald (Cynanthus canivetii) and included in blue-tailed emerald (Chlorostilbon mellisugus). In 2020 the North American Classification Committee of the American Ornithological Society (AOS), the International Ornithological Committee (IOC), and the Clements taxonomy placed it in genus Cynanthus with Carnivet's emerald, broad-billed hummingbird (C. latirostris), Turquoise-crowned hummingbird (C. doubledayi), and the Cozumel emerald (C. forficatus). The 2020 Version 5 of BirdLife International's Handbook of the Birds of the World retains it in Chlorostilbon. [5] [6] [3] [7] [4]
The golden-crowned emerald is 7.5 to 9.5 cm (3.0 to 3.7 in) long and weighs about 2.2 g (0.078 oz). The adult male's crown is brilliant golden green and the rest of its upperparts duller golden green to bronzy green. Its underparts transition from an almost pure green on the chin and throat to brilliant golden green at the vent. The tail is long and deeply forked; its feathers are black with a violet-bluish gloss, and the central three pairs have broad brownish gray tips. The adult female's upperparts are like the male's. Its underparts are light gray that is palest on the belly and vent. Its cheeks are dusky with a grayish white streak behind the eye. Its tail is also forked but much shorter than the male's; the central feathers are bluish green to bronze green and most have a black band near the end and gray tips. The male's bill is red with a black tip, the female's mandible is red with a black tip and the maxilla is black. [5]
The golden-crowned emerald is found in western Mexico from Sinaloa south to eastern Oaxaca and also inland up the Balsas River basin to southern Morelos. It inhabits tropical dry forest at elevations from sea level to 1,800 m (5,900 ft). [5]
The golden-crowned emerald is mostly resident but is thought to make some seasonal elevational movements in a few areas. [5]
The golden-crowned emerald is a "trap-line" feeder, visiting a circuit of flowering plants to take nectar. They wag their tail and spread its fork as they feed. In addition to nectar, they take insects from foliage. [5]
The golden-crowned emerald's breeding season appears to span from February to July. It builds a small cup nest near the tip of a thin branch near the ground. Four nests in Jalisco had a small platform of wood pieces under the cup. The cup was made of kapok seed fibers with grass, bits of wood, and lichens on the outside. The clutch size is two eggs and fledging occurs about 24 or 25 days after hatch. [5] [8]
The golden-crowned emerald has "dry, rattling and chattering calls". [5]
The IUCN has assessed the golden-crowned emerald as being of Least Concern. It has large range and an estimated population of at least 50,000 mature individuals that is believed to be decreasing. [1] "Human activity probably has little short term effect on Golden-crowned Emerald." [5]
The blue-tailed emerald is a hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in tropical and subtropical South America east of the Andes from Colombia east to the Guianas and Trinidad, and south to northern Bolivia and central Brazil.
The Puerto Rican emerald, or zumbadorcito de Puerto Rico in Spanish, is species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Puerto Rico.
The garden emerald is a small hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Costa Rica and Panama.
The green-fronted hummingbird is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Mexico and possibly Guatemala.
The wedge-tailed sabrewing is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Belize, Guatemala, Mexico, and possibly Honduras.
The green-tailed emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Venezuela.
The glittering-bellied emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay.
Canivet's emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, and Nicaragua.
The Cozumel emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to the Mexican island of Cozumel off the Yucatán Peninsula.
The red-billed emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Venezuela.
The western emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Ecuador.
The Chiribiquete emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to southern Colombia.
The short-tailed emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Venezuela. It has also been called Poortman's emerald hummingbird.
The Cuban emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in the Bahamas and Cuba.
The coppery emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Venezuela.
The narrow-tailed emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is found in Colombia and Venezuela.
The Hispaniolan emerald is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to the island of Hispaniola, which is shared by the Dominican Republic and Haiti.
The dusky hummingbird is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Mexico.
The curve-winged sabrewing is a species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It is endemic to Mexico.
The Tres Marías hummingbird is a Near Threatened species of hummingbird in the "emeralds", tribe Trochilini of subfamily Trochilinae. It was formerly considered to be a subspecies of the broad-billed hummingbird. It is endemic to the Islas Marías island group off the west coast of Mexico.
