Southern Emerald-Toucanet

En bref

  • Scientific Name: Aulacorhynchus albivitta
  • Spanish Name: Tucancito esmeralda
  • Family: Ramphastidae
  • Known Nicknames: Southern Emerald Toucanet, Gray-breasted Toucanet
  • Average Length: 33–41 cm / 13–16 in
  • Average Weight: 150–230 g / 5.3–8.1 oz
  • Envergure : N/A
  • Key Feature: Bright green plumage with a blue throat, black bill with yellow and orange markings
  • Régime alimentaire principal : Principalement frugivore
  • Aire de répartition : Andes de Colombie, d'Équateur, du Pérou et de l'ouest du Venezuela
  • Habitat: Montane cloud forest and humid highland forests
  • Social Structure: Social, often in small flocks
  • Nidification/Reproduction : Cavités d'arbres
  • Statut de conservation : Préoccupation mineure (LC)
  • Évolution démographique : En baisse

The Southern Emerald-Toucanet (*Aulacorhynchus albivitta*) is a vibrant, medium-sized toucan found in the cloud forests of the Andes from Colombia to Peru. Its most striking feature is its brilliant emerald-green plumage, which is offset by a distinctive white throat and a chestnut-brown tail tip. Unique among toucanets, it possesses a thick, multi-colored bill that is predominantly black with a yellow stripe along the upper ridge and a white band at the base. This bird is also known for its loud, frog-like call and its social, acrobatic behavior as it forages in small flocks for fruit and insects, making it a charismatic emblem of its high-altitude habitat.

Faits amusants

Despite its vibrant green plumage, the Southern Emerald-Toucanet has a secret weapon: its blue-and-black patterned bill is not just for show—it’s a highly efficient cooling system, flushing blood through its surface to dump excess heat like a radiator. Quirkily, these toucanets are known to “sunbathe” in a peculiar pose, spreading their wings and tilting their heads back to expose their pale throat patch, possibly to regulate parasites or warm up after cold Andean mornings. They also engage in a unique “bill-fencing” behavior during social disputes, where two birds lock beaks and twist their heads in a surprisingly gentle test of strength.

Habitats et répartition

This toucanet inhabits humid montane forests, cloud forests, and forest edges, typically at elevations between 1,500 and 3,100 meters. It is also found in secondary growth and plantations adjacent to its native woodland. Its geographical range extends along the Andes of western Venezuela, through Colombia, Ecuador, and into northern Peru, with isolated populations also occurring in the coastal mountains of northern Venezuela.

Comportements & Reproduction

Southern Emerald-Toucanets are generally monogamous, forming long-term pair bonds that persist across breeding seasons. They nest in natural tree cavities or abandoned woodpecker holes, which both parents help prepare by enlarging the entrance and cleaning the interior. A unique reproductive strategy involves the pair sealing the nest entrance with mud and fruit pulp, leaving only a narrow slit just wide enough for the adults to squeeze through, which provides protection from predators. The female typically lays 2-4 white eggs, and both parents share incubation duties for about 14-16 days. After hatching, the chicks are altricial and are fed by both adults; they fledge around 6 weeks later but remain dependent on the parents for several more weeks. Socially, these toucanets are often seen in small family groups or loose flocks, especially outside the breeding season, and they communicate with a series of frog-like croaks and clicks to maintain contact within their dense montane forest habitat.

Alimentation

The Southern Emerald-Toucanet is primarily a frugivore, with fruit making up the bulk of its diet, but it is also an opportunistic omnivore. It consumes a wide variety of small, soft fruits, berries, and seeds, often plucking them directly from branches while using its long, serrated bill to slice them open. Interestingly, this toucanet is known to supplement its diet with protein-rich insects, spiders, and small lizards, especially during the breeding season when chicks require more nutrients. Additionally, it will occasionally raid the nests of smaller birds to eat eggs or nestlings, and it may even sip nectar from flowers, playing a minor role in pollination.

Couleurs

The Southern Emerald-Toucanet is predominantly vivid green, with a distinctive white throat and a black-tipped, yellow-orange mandible stripe. Its tail features chestnut tips, while the eye is surrounded by a blue or pale blue patch. This green coloration provides excellent camouflage within the forest canopy, and the lack of bright, contrasting patterns on the body helps it blend with dappled sunlight and foliage.