Gilded Sapphire

Is a medium-sized member of the Trochilidae family distinguished by its iridescent bronze-green plumage and a remarkably vibrant golden-copper tail. Reaching an average length of 3.1 to 3.9 inches (8 to 10 centimeters) and weighing between 0.14 and 0.18 ounces (4 to 5 grams), this hummingbird features a straight bill that is strikingly pinkish-orange or bright red with a well-defined black tip. Adult males present a brilliant emerald-green dorsal coloration with golden undertones that intensify towards the rump. A small but intense blue-violet throat patch or chin spot is a key diagnostic feature of this taxon, though its visibility highly depends on the angle of light. Females are slightly duller, exhibiting pale greyish underparts speckled with green, and they usually lack the prominent blue chin patch, though they retain the characteristic bill coloration and golden tail feathers.

Geographical distribution: This avian species is widely distributed across the central and southern regions of South America. Its range encompasses vast territories in Brazil (ranging from Bahia southward to Rio Grande do Sul), eastern Bolivia, the entirety of Paraguay, Uruguay, and northern to central Argentina, extending as far south as the provinces of Buenos Aires and La Pampa. It is a highly adaptable species known to undertake short-distance seasonal migrations or nomadic movements triggered by the local availability of flowering plants.

Habitat: It thrives in a diverse array of semi-open lowland environments, showing a clear preference for dry woodlands, savanna formations such as the Cerrado, shrubby areas of the Chaco, gallery forests, and forest edges. Due to its synanthropic tendencies, it is exceptionally common in human-modified landscapes, including urban parks, residential gardens, orchards, and agricultural zones with scattered trees. It generally avoids the interior of dense, continuous humid forests, preferring ecotones where sunlight promotes the growth of nectar-producing plants.

Feeding: The diet of this species is highly nectarivorous, supplemented regularly by preying on small arthropods to meet its protein requirements. It visits a vast selection of flowering plants from families such as Bromeliaceae, Fabaceae (especially trees of the genus Erythrina), Malvaceae, and Myrtaceae. While foraging, it uses its long, specialized bill and protrusible, bifurcated tongue to extract nectar while hovering. To obtain essential amino acids, it actively hunts insects in mid-air through hawking or plucks tiny spiders directly from webs and foliage.

Behavior: It is known for its highly territorial and aggressive temperament, actively defending productive floral patches against conspecifics, other hummingbird species, and even larger passerines. Its flight is incredibly agile, swift, and precise, allowing it to hover stationary in front of flowers or fly backwards. During the breeding season, males establish high, exposed perches from which they sing persistent, high-pitched songs and perform spectacular aerial courtship displays to attract females.

Nesting: The entire reproductive cycle is carried out solely by the female, who takes full responsibility for building the nest, incubating the clutch, and rearing the young. The nest is a compact, cup-shaped structure meticulously woven from soft plant downs, mosses, and lichens, securely bound together with spider silk to allow the structure to expand as the chicks grow. It is typically positioned on a thin horizontal branch of a tree or shrub, situated at heights ranging from 3 to 13 feet (1 to 4 meters) above the ground. The female lays a standard clutch of two white eggs, which she incubates for approximately 15 to 16 days. The altricial chicks hatch naked and blind, remaining in the nest for 20 to 22 days where they are fed high-protein regurgitated food by the mother.

Conservation status: It is currently classified as Least Concern (LC) on the IUCN Red List of Threatened Species. This classification is justified by its vast geographical range, stable population trends, and outstanding ability to adapt to human-altered habitats. While the species is not facing immediate global threats of extinction, localized populations can still be impacted by intense habitat fragmentation, urbanization, and the intensive use of agrochemicals that reduce the abundance of native flora and insect prey.