White-winged Swallow

En bref

  • Scientific Name: Tachycineta albiventer
  • Spanish Name: Golondrina aliblanca
  • Family: Hirundinidae
  • Known Nicknames: White-winged Swallow, White-rumped Swallow, White-winged Swallow
  • Longueur moyenne : 13–14 cm / 5,1–5,5 pouces
  • Average Weight: 14–18 g / 0.49–0.63 oz
  • Wingspan: 28–30 cm / 11–12 in
  • Key Feature: White rump and white wing patches contrasting with dark blue-black upperparts
  • Régime alimentaire principal : Insectivore
  • Range: South America (Amazon Basin, Orinoco Basin, and Guianas) to northern Argentina
  • Habitat: Open areas near water (rivers, lakes, marshes) and forest edges
  • Social Structure: Semi-colonial to colonial
  • Nesting/Breeding: Cavities (natural tree holes, abandoned woodpecker holes, nest boxes)
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The White-winged Swallow (*Tachycineta albiventer*) is a strikingly elegant bird found near rivers and wetlands across tropical South America. Its most unique characteristic is the bold, pure white patch on the underside of each wing, which contrasts vividly with its glossy, deep blue-black upperparts and clean white underbelly when in flight. This medium-sized swallow features a slightly forked tail and a delicate, streamlined body, allowing it to perform agile aerial acrobatics as it hunts for insects over water. A special feature is its nesting behavior: unlike many swallows that build mud cups, this species often excavates its own burrows in sandy riverbanks or cliff faces, sometimes forming loose colonies. Its bright, chirping calls and effortless, swooping flight make it a captivating sight along tropical waterways.

Faits amusants

Despite its elegant name, the White-winged Swallow is a bit of a homebody—it rarely migrates, sticking to its tropical South American range year-round. One quirky habit is its passion for bathing in the rain, where it will actively flutter and splash in the middle of a downpour rather than seek shelter. It also has a unique adaptation: its nest, a simple cup lined with feathers and grass, is almost always built near water, often in a natural cavity like a riverbank hole or a bridge crevice, which helps it escape predators that avoid wet terrain.

Habitats et répartition

The White-winged Swallow is closely associated with lowland freshwater habitats, primarily inhabiting the edges of rivers, streams, lakes, and flooded savannas. It is almost always found near open water, where it forages for flying insects. This species avoids dense forest interiors, preferring clearings and disturbed areas adjacent to water bodies. Geographically, the White-winged Swallow has a broad distribution across tropical South America, ranging from eastern Colombia, Venezuela, and the Guianas, south through the Amazon Basin of Brazil, Peru, Ecuador, and Bolivia, and extending into northern Argentina and Paraguay. It is generally resident throughout its range, though local movements may occur in response to seasonal flooding.

Comportements & Reproduction

The White-winged Swallow is typically monogamous, with pairs forming during the breeding season and often reuniting across multiple years. Courtship involves aerial chases and synchronized flights, where males pursue females while calling, and the pair may inspect potential nest sites together. Social structure is loosely colonial; they nest solitarily but often in loose aggregations near water, defending small territories around the nest cavity. A unique reproductive strategy is their strong preference for natural tree hollows or abandoned woodpecker holes near rivers, rarely using artificial structures. The female lays 3-5 white eggs, and both parents share incubation duties for about 15-16 days. After hatching, the chicks are altricial and are fed by both adults, fledging after approximately 20-24 days. There is no evidence of cooperative breeding or extra-pair copulations being common in this species.

Alimentation

The White-winged Swallow is an aerial insectivore, meaning it captures all its prey exclusively in flight, typically foraging low over water bodies like rivers, lakes, and wetlands. Its diet consists almost entirely of small flying insects, including flies, mosquitoes, beetles, moths, and winged ants, which it snatches with its wide, gaping beak during swift, erratic chases. An interesting fact about its feeding behavior is that it often hunts in mixed-species flocks alongside other swallows and martins, taking advantage of insect swarms stirred up by larger animals or disturbances. Additionally, unlike many swallows that feed primarily at dawn and dusk, the White-winged Swallow is known to forage actively throughout the hottest parts of the day, capitalizing on the abundant insect life near tropical waterways.

Couleurs

The White-winged Swallow has a striking contrast: glossy steel-blue to violet-black upperparts and a pure white underside, with a distinctive white patch on the inner wing feathers visible in flight. Its white rump and forked tail are unique among swallows, and it lacks bold facial markings, with no specific camouflage adaptations beyond countershading, where the dark back blends with water or sky and the white belly hides against the bright surface.