Northern-emerald Toucanet

Quick Facts

• Scientific Name: Aulacorhynchus prasinus
• Spanish Name: Tucancito esmeralda
• Family: Ramphastidae
• Known Nicknames: Emerald Toucanet, Northern Emerald-Toucanet
• Average Length: 30–37 cm / 12–14.5 in
• Average Weight: 118–230 g / 4.1–8.1 oz
• Wingspan: 45–50 cm / 18–20 in
• Key Feature: Vibrant grass-green plumage with a large, colorful bill (black and yellow) and a blue throat patch
• Primary Diet: Primarily Frugivore (opportunistically feeds on insects, small lizards, and bird eggs)
• Range: Southern Mexico through Central America to northern Nicaragua
• Habitat: Humid montane forests, cloud forests, and canopy edges
• Social Structure: Social (typically found in pairs or small groups of 3 to 10 individuals)
• Nesting/Breeding: Tree cavities (often abandoned woodpecker holes)
• Statut de conservation : Préoccupation mineure (LC)
• Population Trend: Decreasing

The Northern-emerald Toucanet (*Aulacorhynchus prasinus*) is a striking, jewel-like inhabitant of the humid montane forests of Mexico and Central America, renowned for its brilliant grass-green plumage that blends seamlessly into the canopy. Though small for a toucan, this captivating bird boasts a disproportionately large, colorful bill decorated with bright yellow on the upper mandible, solid black on the lower, and a distinctive white line at the base. Its appearance is further enhanced by a throat patch that ranges from pristine white to rich blue depending on the region, complemented by warm chestnut-colored undertails. Highly social and acrobatic, these energetic birds travel in small, noisy flocks, using their specialized, lightweight bills to feed on a diverse diet of fruits, insects, and small vertebrates, cementing their role as vital seed dispersers in their cloud forest habitats.

Faits amusants

Despite their elegant green plumage, Northern Emerald-Toucanets sound less like tropical birds and more like barking puppies or croaking frogs. To fit into cozy, abandoned woodpecker holes for sleep, they perform a clever trick of avian origami, folding their tails completely flat over their backs and tucking their bills in to become a compact, space-saving ball. While their hollow, lightweight bills look like delicate fruit-gathering tweezers, they also use them to "fence" with rivals in playful duels and, surprisingly, to raid other birds' nests for eggs and nestlings as opportunistic predators.

Habitats et répartition

The geographical distribution of this species spans the highland regions of Middle America, extending from southern and eastern Mexico through Guatemala, Belize, El Salvador, Honduras, and Nicaragua. It is primarily restricted to mountainous terrain, establishing a prominent presence along the Sierra Madre and adjacent Central American cordilleras.

Within this range, it inhabits humid montane forests, cloud forests, and wet oak-pine woodlands, typically at elevations ranging from 900 to 3,000 meters above sea level. It is also commonly found along forest edges, in canopy openings, and in adjacent secondary growth or shaded agricultural areas, such as coffee plantations, where it utilizes the canopy for foraging and nesting.

Comportements & Reproduction

These social birds are typically observed in pairs or small, active foraging groups of up to ten individuals, moving through the forest canopy in a follow-the-leader fashion. During the breeding season, they form monogamous pairs. Courtship behavior is highly interactive and essential for bond formation, characterized by mutual preening, rhythmic bill-clacking, and courtship feeding, where the male presents fruits to the female.

Nesting occurs in tree cavities, typically utilizing abandoned woodpecker holes or natural hollows, which the pair may cooperatively excavate further. The female lays a clutch of three to four white eggs, which both parents take turns incubating for approximately 16 days. After hatching, both the male and female share the responsibilities of brooding and feeding the helpless, blind chicks a diet of fruit and insects until they fledge at about five to six weeks of age.

Alimentation

The Northern Emerald-Toucanet is primarily frugivorous, feeding on a wide variety of fruits from canopy trees, particularly figs, palms, and members of the laurel family, which it swallows whole and later regurgitates the seeds, playing a vital role in forest seed dispersal. However, this colorful bird is also an opportunistic omnivore that supplements its diet with protein by hunting insects, spiders, tree frogs, and small lizards. Intriguingly, it is a notorious nest predator, frequently raiding the nests of other bird species to consume their eggs and nestlings. To eat, the toucanet employs a fascinating feeding technique: because its tongue cannot easily move food back, it grips a fruit or prey item with the tip of its large, serrated bill and tosses its head backward to throw the food directly into its throat.

Couleurs

The Northern-emerald Toucanet features vibrant grass-green plumage that provides excellent camouflage within its cloud forest canopy habitat. It is distinguished by a clean white throat, rich chestnut-red undertail coverts, and chestnut-tipped tail feathers. Its most striking feature is its massive bicolored bill, which boasts a bright yellow upper mandible and a black lower mandible, bordered by a conspicuous white line at the base.

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