Toucan montagnard à bec laminé

En bref

  • Scientific Name: Andigena laminirostris
  • Spanish Name: Tucán piquilaminado
  • Family: Ramphastidae
  • Known Nicknames: Laminated Mountain-Toucan, Plate-billed Toucan
  • Average Length: 42–53 cm / 16.5–21 in
  • Average Weight: 275–355 g / 9.7–12.5 oz
  • Wingspan: 46–56 cm / 18–22 in
  • Key Feature: A raised, yellowish-ivory rectangular plate (lamina) on the sides of the upper mandible, set against a dark red and black bill
  • Régime alimentaire principal : Principalement frugivore
  • Range: Western slopes of the Andes in southwestern Colombia and western Ecuador
  • Habitat: Humid montane forests and temperate cloud forests
  • Social Structure: Social (found in pairs or small family groups of up to 6 individuals)
  • Nesting/Breeding: Tree cavities (typically abandoned woodpecker nests)
  • Statut de conservation : Quasi menacé (NT)
  • Évolution démographique : En baisse

The Plate-billed Mountain-Toucan (*Andigena laminirostris*) is a strikingly beautiful and charismatic bird native to the misty, high-altitude cloud forests of the Andean slopes in Ecuador and Colombia. This medium-sized toucan boasts a vibrant, multi-colored plumage characterized by a deep blue-gray breast, an olive-brown back, bright yellow patches on its flanks, and rich chestnut thighs. However, its most defining and extraordinary feature is its heavy, colorful bill; colored in shades of black and red, it is uniquely adorned with a raised, rectangular, ivory-yellow plate on the side of the upper mandible, which gives the species its name. This specialized bill is not only a visual marvel used in courtship displays but also a highly efficient tool for plucking exotic fruits high in the canopy, making this near-threatened species a vital seed disperser within its fragile mountain ecosystem.

Faits amusants

This high-altitude acrobat is famous for the raised, ivory-colored rectangular "plate" on its bill, a unique structure whose exact purpose remains an evolutionary mystery. When communicating, they don't sing; instead, they emit a comical, nasal braying sound reminiscent of a donkey or a squeaky toy, accompanied by dramatic, synchronized head-jerks. During courtship, mates engage in playful games of "fruit toss," delicately throwing berries back and forth to woo each other. Despite their bulky appearance, they are incredibly agile tree-dwellers that prefer to bounce through the misty Andean canopy like colorful squirrels rather than fly.

Habitats et répartition

This species is native to a narrow latitudinal band along the western slopes of the Andes, stretching from southwestern Colombia, specifically the Nariño department, southwards through western Ecuador. Within this restricted geographical range, it is primarily found in the subtropical and temperate zones of the mountain range, where its distribution is relatively continuous but highly localized. Its primary habitat consists of wet, humid montane forests and cloud forests, typically occurring at elevations between 1,200 and 3,200 meters above sea level. It thrives in dense, canopy-rich environments characterized by a high abundance of epiphytes, mosses, and bromeliads, and it frequently utilizes forest edges and mature secondary growth for foraging.

Comportements & Reproduction

This species is highly social, typically moving in pairs or small family groups of three to six individuals, and occasionally joining mixed-species foraging flocks. They are active, agile foragers that defend their territories through vocalizations and physical displays. During the breeding season, pairs exhibit strong monogamous bonds reinforced by elaborate courtship rituals, which include mutual feather preening, synchronous duetting, and courtship feeding where partners bill-toss fruits to one another. Nesting occurs in tree cavities, frequently utilizing abandoned woodpecker holes located high in the canopy. Both parents participate in modifying the nest cavity, incubating the clutch of two to three eggs for about 16 days, and rearing the altricial chicks. A notable reproductive strategy of this species is occasional cooperative breeding, where helper helpers—often older offspring from previous seasons—assist the breeding pair in feeding and defending the nestlings, thereby enhancing the overall survival rate of the brood.

Alimentation

The Plate-billed Mountain-Toucan is primarily a frugivore, consuming a wide variety of fruits from forest canopy trees, particularly those in the Lauraceae and Ericaceae families. While fruit constitutes the bulk of its diet, this species is also an opportunistic omnivore that supplements its nutrition with insects, flowers, tree frogs, lizards, and the eggs or nestlings of other birds. An interesting aspect of its feeding ecology is its role as a key seed disperser in the Andean cloud forests; the toucan swallows fruits whole and later regurgitates the large seeds undamaged, aiding in forest regeneration. Furthermore, these birds exhibit a highly adaptable foraging behavior, occasionally descending to the forest floor or following army ant swarms to snatch insects that are flushed out by the moving ants.

Couleurs

The Plate-billed Mountain-Toucan features an olive-brown back, a striking lavender-blue breast, and bright yellow flank patches. Its black head is offset by bare yellow and turquoise facial skin around red eyes, while its undertail is red and thighs are chestnut. Its most distinctive mark is the heavy black and yellow bill, which sports a unique, raised ivory-white rectangular plate near the base of the upper mandible.