Glittering-throated Emerald

Identification

The Glittering-throated Emerald is a small hummingbird, measuring 8 to 12 cm in length and weighing only 3.5 to 6.2 grams. Both sexes share a straight bill with a blackish upper mandible and pinkish lower mandible tipped with dark. In the nominate subspecies, adult males display golden- to bronze-green upperparts and a dark bronze-green to blackish tail. Their most distinctive feature is a glittering golden-green throat and breast, which contrasts sharply with a white belly and white undertail coverts with brownish centers. Adult females resemble males but have white barring near the throat feathers and greenish-gray tips on their outermost tail feathers, while juveniles are more grayish-brown on the breast.

Seven subspecies are recognized across the species' range, each with subtle variations. Some subspecies display turquoise to bluish sheens on the throat, while others have coppery to purplish uppertail coverts or significantly longer bills. These differences can aid identification in the field, though careful observation is needed.

Range & Habitat

The Glittering-throated Emerald is found across a vast range spanning Bolivia, Brazil, Colombia, Ecuador, the Guianas, Peru, Trinidad, and Venezuela. Different subspecies occupy distinct regions: from the Orinoco Basin through the Guianas and northern Brazil, across the Amazon Basin, into the eastern Andes, and south to coastal southeastern Brazil from Espírito Santo to Rio Grande do Sul. This wide distribution reflects the species' remarkable adaptability.

Unlike many hummingbirds, this species avoids the interior of dense forests, instead favoring semi-open to open landscapes. It thrives in less dense dry and humid forest, gallery forest, secondary forest, open woodland, savanna, scrublands, caatinga, plantations, and gardens. The coastal subspecies also inhabits mangroves, further demonstrating the species' ecological flexibility.

Behaviour & Diet

The Glittering-throated Emerald forages for nectar using trap-lining, visiting a regular circuit of flowering plants. It feeds on a remarkably diverse array of herbs, bushes, vines, and trees from at least 10 different plant families, rarely venturing higher than the lower forest strata. In addition to nectar, it supplements its diet with small insects, a strategy common among hummingbirds.

Breeding seasons vary geographically, occurring in August and September in Guyana and northeastern Brazil, November to February in central Brazil, and November to April in eastern Brazil. Females construct delicate cup nests from plant fibers bound with spiderweb and decorated with lichen on the exterior, typically placing them 1 to 4 meters above ground, though occasionally higher. The species typically raises two broods per year, with females incubating two eggs for 14 to 17 days and fledging occurring within 18 to 22 days.

Best Time & Places to See It

The Glittering-throated Emerald's wide distribution means it can be encountered across much of northern South America and eastern Brazil. Open habitats such as gardens, plantations, and secondary forest offer the best viewing opportunities, as the species shuns dense primary forest. Timing depends on location: visit Guyana and northeastern Brazil in August and September, central Brazil from November to February, or eastern Brazil from November to April to coincide with breeding activity when birds are most active.

Early morning offers the best chances to observe these hummingbirds, particularly during dawn when they vocalize most actively. Look for them visiting flowering plants in open areas, and listen for their distinctive high-pitched buzzy notes.

Photography Tips

The Glittering-throated Emerald's iridescent throat presents a compelling photographic subject, though the glittering effect requires careful attention to lighting angle. Position yourself so light strikes the bird's throat at an angle to capture the golden-green iridescence that gives the species its name. Early morning light often provides ideal conditions for photographing this effect.

The species' preference for lower vegetation and its trap-lining behavior mean predictable feeding routes offer opportunities for patient photographers. Set up near flowering plants or feeders in open gardens and wait for the birds to visit on their regular circuits. Fast shutter speeds (1/2000 second or faster) are essential to freeze the rapid wing beats typical of hummingbirds, and a telephoto lens will help you maintain distance while capturing detailed head and throat shots.