<trp-post-container data-trp-post-id='360652'>Rufous-sided Crake

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Rufous-sided Crake

En bref

  • Scientific Name: Laterallus melanophaius
  • Spanish Name: Polluela de flancos rufos
  • Family: Rallidae
  • Known Nicknames: Rufous-sided Crake
  • Average Length: 14–16 cm / 5.5–6.3 in
  • Average Weight: 30–45 g / 1.1–1.6 oz
  • Envergure : N/A
  • Key Feature: Rufous flanks and sides contrasting with a gray breast and brown upperparts
  • Régime alimentaire principal : Omnivore
  • Range: Northern and central South America, east of the Andes, from Colombia to Argentina and Uruguay
  • Habitat: Freshwater marshes, wet grasslands, and rice paddies
  • Structure sociale : Solitaires ou en couples
  • Nesting/Breeding: Nest built on the ground in dense vegetation near water
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : Stable

The Rufous-sided Crake (*Laterallus melanophaius*) is a secretive, small rail of South American wetlands, instantly recognizable by its striking flank coloration—a rich, warm rufous that contrasts sharply with its slate-gray head, neck, and breast, while its back and wings are a dark, olive-brown. This elusive bird, measuring only about 15 cm (6 inches) long, possesses a short, slightly downcurved yellowish-green bill and distinctive white barring on its belly and undertail coverts. A unique special feature is its partial albinism in some populations, occasionally resulting in white patches on the head. Its loud, repetitive “kree-kree-kree” call often betrays its presence in dense marshes, though it remains a master of concealment, preferring to skulk through thick vegetation rather than fly.

Faits amusants

Despite its name, the rufous-sided crake is far more likely to be heard than seen, possessing a surprisingly loud, metallic "kek-kek-kek" call that can echo across a marsh for hundreds of meters. It is a master of escape, often freezing mid-step with one foot raised to blend seamlessly with vertical reeds, then suddenly sprinting with a peculiar, high-stepping gait that keeps its body hidden below the grass canopy. An obsessive forager, it uses its long toes to deftly snatch aquatic insects and snails from beneath floating vegetation, occasionally performing a rapid, vibrating tail-flick that seems to startle hidden prey into movement.

Habitats et répartition

The Rufous-sided Crake inhabits a variety of freshwater wetlands, including marshes, flooded grasslands, the edges of ponds and lakes, and rice paddies. It prefers dense, emergent vegetation such as reeds, sedges, and tall grasses, where it can skulk near the water's edge. Its geographical range spans much of South America east of the Andes, from Colombia, Venezuela, and the Guianas south through Brazil, Paraguay, and Uruguay to central Argentina. It is also found on the island of Trinidad.

Comportements & Reproduction

The Rufous-sided Crake is secretive and generally solitary, with pairs forming only during the breeding season. Mating appears to be monogamous, and courtship involves vocal duets between the male and female, often with the male’s lower-pitched call answered by the female’s higher notes. They nest in dense, wet vegetation near water, constructing a shallow cup of woven grasses and leaves. A unique reproductive strategy is their ability to breed opportunistically in response to rainfall or flooding, laying two to three clutches per season if conditions remain favorable. Both parents share incubation, which lasts about 18–20 days, and care for the precocial chicks, which leave the nest within hours of hatching. The social structure outside breeding is loose, with individuals rarely interacting except at abundant food sources.

Alimentation

The Rufous-sided Crake is an omnivorous bird that forages primarily in dense, wet vegetation along marsh edges and flooded grasslands, using its long toes to walk on floating plants. Its diet consists mainly of small aquatic invertebrates such as insects, spiders, snails, and worms, which it picks from mud and shallow water. It also consumes a variety of plant matter, including seeds, grass blades, and small aquatic fruits. An interesting fact is that this crake is a secretive and crepuscular feeder, doing most of its foraging at dawn and dusk to avoid predators, and it often swallows small pebbles (grit) to help grind tough plant material in its muscular gizzard.

Couleurs

The Rufous-sided Crake has a dark brown to blackish crown and upperparts, with a prominent white throat and belly. Its flanks and sides are a rich, warm rufous, contrasting sharply with a white chin and a black-and-white barred pattern on the undertail coverts. The bird’s overall cryptic brown and rufous coloration provides excellent camouflage in dense, marshy vegetation, while the white throat and belly create a disruptive pattern that breaks up its outline.

Distribution Map

Places linked to this species. A sighting is never guaranteed.