Uccello campanaro tricaruncolato

Identificazione

One of four species of bellbird that live in Central and South America, the three-wattled bellbird is between 25 cm (9.8 in) and 30 cm (12 in) long. The body, tail, and wings of the male are uniformly chestnut-brown; its head, neck, and upper breast are white; and it has a black eye-ring, eye-stripe, and bill. Its name comes from the three worm-like wattles of skin that hang from the base of the bill. These wattles can be as long as 10 cm (3.9 in) when extended during songs and interactions. The wattles remain flaccid even when extended. The male shakes the wattles, but otherwise they hang straight down; they are neither erectile nor under muscular control. The side wattles do not stick out to the sides and the central one is not extended directly skywards as shown on some old illustrations and specimens. The purpose of the wattles is unclear. <p>The female bellbirds are smaller and less striking in appearance, being overall olive with yellowish streaking below, pure yellow vent and no wattles. The females blend into the surroundings of the forest, which helps them hide its nests from predators. The nests are very difficult to spot. As of January 2019, only six nests had been found in Monteverde, according to the council for the Bellbird Biological Corridor. <p>Juvenile males are often confused with females; they have the same coloring as females until they reach sexual maturity at age 7. As they age, the males slowly molt the green and brown feathers and begin to grow the striking white and copper coat. They do not begin to grow their wattles until they are 1 to 2 years old, and the wattles continue to grow for the entirety of the male bird's life.

Tassonomia

Nome scientifico

Procnias tricarunculatus

Autorità

(Verreaux, J & Verreaux, É, 1853)

Ordine

Passeriformi

Famiglia

Cotingidi

Genere

Procnias

Areale e habitat

Famous for having one of the most unusual and distinct vocalizations of any bird in its range, the three-wattled bellbird exists from western Honduras south to eastern Panama. Bellbirds breed primarily in Costa Rican highlands in the cloud forest (March–September) and return to lower elevations in the mangroves for the interim months.

Migrazione

Vertical migration

Comportamento

The species is completely frugivorous; it swallows the fruits from trees in the Lauraceae family, of which the avocado is a member. The bellbird performs an important role in seed dispersal. It regurgitates the seeds it cannot digest and deposits them in gap areas beneath song perches, which nearly doubles seedling survival rate.

Conservazione

Tendenza della popolazione

declining