Crowned Woodnymph (female)

Quick Facts

• Scientific Name: Thalurania colombica
• Spanish Name: Ninfa coronada
• Family: Trochilidae
• Known Nicknames: Violet-crowned Woodnymph, Green-crowned Woodnymph
• Average Length: 8.4–9.5 cm / 3.3–3.7 in
• Average Weight: 3.5–4.5 g / 0.12–0.16 oz
• Wingspan: 10–12 cm / 4.0–4.7 in
• Key Feature: Dull green upperparts with pale grey to whitish underparts and a slightly notched tail
• Primary Diet: Nectarivore and Insectivore
• Range: Central America (Guatemala to Panama) and Northern South America (Colombia, Venezuela)
• Habitat: Humid lowland and montane forest, forest edges, and tall second growth
• Social Structure: Solitary and Territorial
• Nesting/Breeding: Small cup nest on a horizontal tree branch
• Statut de conservation : Préoccupation mineure (LC)
• Population Trend: Decreasing

The female Crowned Woodnymph (*Thalurania colombica*) is a study in subtle elegance, displaying a refined palette that contrasts sharply with the flamboyant violet and green of her male counterpart. She is characterized by her shimmering bronzy-green upperparts and a distinctive pale, grayish-white throat and breast, a color scheme that provides excellent camouflage within the dappled light of the tropical understory. Her most defining features include a medium-length, slightly decurved black bill—perfectly engineered for "trap-lining" nectar from diverse forest blooms—and a dark, slightly forked tail marked with prominent white tips on the outer feathers. These white accents create a striking flash during flight, making this agile hummingbird a captivating sight as she darts through the humid forests of Central and South America, serving as a vital, high-energy pollinator for her ecosystem.

Faits amusants

The female Crowned Woodnymph is a master of architectural camouflage, using sticky spider silk to bind lichen and moss to her tiny cup-shaped nest so it resembles a natural knot on a tree branch. While less iridescent than the male, she is a clever "nectar robber," often using her sharp bill to pierce the base of long tubular flowers to steal sugar without providing any pollination in return. She is also a highly disciplined "trapliner," memorizing specific floral circuits and aggressively defending these hidden nectar routes from much larger intruders to secure her high-energy fuel.

Habitats et répartition

The Crowned Woodnymph is distributed across a broad range extending from southern Guatemala and Belize through Central America into northern South America, specifically northern Colombia and western Venezuela. Within this territory, it occupies various altitudinal zones, though it is most commonly found in humid lowland regions and foothills up to middle elevations. This species primarily inhabits the interior and edges of humid evergreen forests, as well as tall secondary growth and semi-open woodland. While males are often seen higher in the canopy, females are frequently found foraging in the understory and mid-levels of the forest. They also adapt well to human-modified landscapes such as shaded coffee plantations, large gardens, and clearings that remain in close proximity to primary forest cover.

Comportements & Reproduction

The female exhibits a solitary and highly active lifestyle, primarily foraging through a strategy known as traplining, where she follows a consistent route to visit specific flowering plants. While less overtly aggressive than the males, she remains territorial over high-quality nectar sources within the forest understory. She maintains no permanent social bonds, interacting with others only briefly during the breeding season, and spends the majority of her time independently navigating her home range to satisfy her high energy requirements. During the breeding season, she participates in a polygynous mating system, selecting a mate after observing the competitive aerial displays and plumage of males. Once mating has occurred, she takes full responsibility for the reproductive cycle, from constructing a delicate cup-shaped nest out of moss and spider webs to incubating the typical clutch of two eggs. She receives no assistance from the male, providing all the care and nutrition for the hatchlings by gathering a mix of nectar and small arthropods until they are ready to fledge.

Alimentation

The female Crowned Woodnymph is primarily a nectarivore, sustaining itself on the sugary secretions of a wide variety of flowering plants, including epiphytes, shrubs, and trees such as Hamelia and Inga. Unlike the more aggressive males that often defend specific floral territories, females typically employ a "trap-lining" foraging strategy, following a consistent circuit to visit scattered nectar sources throughout the forest. To supplement this high-energy sugar diet with essential proteins and minerals, they also hunt small insects and spiders, often capturing them mid-air through hawking or gleaning them directly from foliage. Because they are frequently subordinate to males in the social hierarchy of hummingbirds, these females have adapted to be highly efficient and opportunistic foragers, often visiting less-contested flowers or foraging in the forest understory to avoid direct competition.

Couleurs

The female Crowned Woodnymph features metallic green upperparts and pale gray underparts, providing effective camouflage within forest foliage. It is distinguished by a dusky cheek patch and a blue-black tail tipped with conspicuous white on the outer feathers. This muted coloration lacks the male's intense iridescence, favoring blending into dappled light.

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