Tucán Pechigualdo

Identificación

The yellow-throated toucan is 47 to 61 cm (19 to 24 in) long and weighs 584 to 746 g (1.3 to 1.6 lb). The three subspecies differ little in their dimensions, though females' bills are shorter than males' in all three. Bill lengths vary between 15.1 and 19.8 cm (5.9 and 7.8 in) in males and 12.9 and 16.0 cm (5.1 and 6.3 in) in females. Other measurements differ little by sex. Their wing chord is 20.4 to 24.8 cm (8.0 to 9.8 in), their tail length is 14.0 to 16.2 cm (5.5 to 6.4 in), and their tarsus is 4.7 to 5.5 cm (1.9 to 2.2 in) long.<p>The yellow-throated toucan's subspecies have essentially the same plumage. They are mostly black, with a maroon tint to the hindneck and upper back and white uppertail coverts. Their face, throat, and upper breast are bright yellow with white and crimson bands below the breast. Their vent and undertail coverts are bright red. The bare skin around their eye does differ: sky blue in the nominate R. a. ambiguus, yellow green in R. a. abbreviatus, and varying between yellow and bright green in R. a. swainsonii. The three subspecies' bills differ as well. All have a mostly yellow maxilla with a greenish yellow stripe on the culmen and a thin black line at the base. The nominate and R. a. abbreviatus have black mandibles; R. a. swainsonii' is maroon to reddish chestnut brown.

Taxonomía

Three subspecies of yellow-throated toucan are recognized:<p>All three subspecies were originally described as separate species. R. a. abbreviatus was relatively early reassigned as a subspecies of R. a. ambiguus. Subspecies R. a. swainsonii differs from ambiguus by 1.35% in mitochondrial DNA which led to its treatment as a species by major taxonomies until about 2010.

Nombre científico

Ramphastos ambiguus

Autoridad

Swainson, 1823

Orden

Piciformes

Familia

Ranfástidos

Género

Ramphastos

Distribución y hábitat

The "chestnut mandibled" R. a. swainsonii primarily inhabits lowland evergreen primary forest and also occurs in gallery forest, older secondary forest, and well-treed parks and gardens. It shuns dry forest and large open areas but can be found in plantations with fruiting trees that border forest. The two "black-mandibled" subspecies are usually found in the interior of humid primary montane forest but also occur at its edges and clearings and in older secondary forest. In Ecuador the "chestnut-mandibled" is found from sea level to 1,000 m (3,300 ft), in Colombia below 2,000 m (6,600 ft), and in Costa Rica to 1,200 m (3,900 ft). The "black-mandibled" occurs between 1,000 and 1,600 m (3,300 and 5,200 ft) in Ecuador and up to 2,500 m (8,200 ft) in Colombia.

Migración

Especie residente

Comportamiento

Patrón migratorio: Especie residente.

Conservación

Tendencia poblacional: en declive.

Tendencia poblacional

en declive