White-vented Plumeleteer

Quick Facts

• Scientific Name: Chalybura buffonii
• Spanish Name: Colibrí de Buffon
• Family: Trochilidae
• Known Nicknames: Buffon's Plumeleteer
• Average Length: 10.5–12 cm / 4.1–4.7 in
• Average Weight: 6–9 g / 0.21–0.32 oz
• Wingspan: 15–18 cm / 5.9–7.1 in
• Key Feature: Conspicuous white, fluffy undertail coverts and bright pinkish-red feet
• Primary Diet: Nectarivore (Nectar and small insects)
• Range: Central Panama through Colombia and Venezuela to Western Ecuador
• Habitat: Humid forest edges, second-growth forests, and shrubby clearings
• Social Structure: Solitary and highly territorial
• Nesting/Breeding: Small cup nest made of plant fibers and spiderwebs on low branches
• Conservation Status: Least Concern (LC)
• Population Trend: Stable

The White-vented Plumeleteer (*Chalybura buffonii*) is a robust and strikingly large hummingbird native to the humid forests and edges of Central and northern South America. Its most defining feature is the exceptionally fluffy, snowy-white undertail coverts—the "plumelets"—which create a dramatic contrast against its shimmering metallic bronze-green plumage and are often puffed out during territorial displays. While both sexes possess distinctive pinkish-red feet and a slightly decurved black bill, they exhibit notable sexual dimorphism: males boast a deep, glittering emerald breast, whereas females feature pale greyish underparts. Known for its bold and assertive personality, this charismatic bird is a dominant presence at nectar sources, aggressively defending its floral territory with a mix of aerial agility and vibrant, iridescent beauty.

Fun Facts

This hummingbird is famous for its exceptionally fluffy, snow-white undertail coverts, which it puffs out like a decorative tutu during territorial disputes or courtship displays. It stands out from its relatives with its surprisingly bright pink or red legs and feet, a vivid contrast to its iridescent green feathers. A bold and aggressive feeder, it often engages in "nectar robbing" by piercing the base of long flowers to bypass their defenses, and it has a unique preference for building its cup-shaped nests on thin branches that dangle precariously over forest streams.

Habitats & Distribution

Its geographical range extends from central Panama through northern Colombia and Venezuela, reaching as far south as western Ecuador. Within this territory, it primarily inhabits the borders of humid and semi-deciduous forests, as well as dense second-growth thickets and shaded agricultural areas like coffee and cacao plantations. It is most frequently encountered in lowland regions and foothills, typically ranging from sea level to elevations of around 2,000 meters. In these environments, it favors the understory and mid-story levels, often frequenting gardens and clearings with flowering shrubs. While it thrives in relatively moist conditions, it is also found in seasonally dry forests and open woodland, demonstrating a degree of flexibility in its habitat preferences across its South American distribution.

Behaviours & Reproduction

This species is notably aggressive and territorial, frequently dominating nectar-rich flowering trees and chasing away both smaller and larger hummingbird species. It maintains a solitary social structure, with individuals coming together only briefly for mating. Males are polygynous and do not form long-term pair bonds; instead, they defend high-quality feeding territories and use vocalizations or aerial displays to attract multiple females throughout the breeding season. The female takes full responsibility for reproduction, from nest construction to chick-rearing. She builds a compact, cup-shaped nest using plant fibers, moss, and spider silk, typically positioned on a low horizontal branch. A standard clutch consists of two small white eggs, which the female incubates alone. Once the eggs hatch, she provides all the necessary care and food for the fledglings without any assistance from the male, a strategy common among many tropical hummingbirds.

Diet

The White-vented Plumeleteer primarily sustains itself on a diet of nectar collected from a variety of flowering plants, particularly favoring the tubular blooms of Heliconia, Costus, and Pachystachys. As an active and often aggressive forager, this hummingbird frequently establishes and defends feeding territories around high-quality floral resources, though it may also employ a "trap-lining" strategy by visiting a series of dispersed flowers in a regular circuit. Beyond nectar, it supplements its nutritional needs with small arthropods and insects, which provide essential proteins and minerals; these are typically captured through aerial hawking or by gleaning them directly from foliage. Interestingly, its assertive nature allows it to dominate smaller hummingbird species at competitive feeding sites, ensuring priority access to the richest nectar sources available within its tropical habitat.

Colors

The White-vented Plumeleteer features metallic bronze-green plumage and a dark blue-black tail, set against its most striking mark: puffy, snowy-white undertail coverts. It is further distinguished by bright reddish-pink legs and a slightly decurved black bill. While males are iridescent, females possess grayish-white underparts that provide effective camouflage within the shaded forest understory.

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