Nombre en español: Semillero cariamarillo

Nombre en ingles: Yellow-faced Grassquit

Nombre cientifico: Tiaris Olivaceus

Familia: Thraupidae

Canto: Andrea Lopera Salazar

El Semillero cariamarillo – Tiaris olivaceus es una pequeña especie de ave perteneciente a la familia Thraupidae del orden Passeriformes. Existe en México, Centroamérica, norte de Sudamérica, Antillas Mayores, y las Islas Caimán.

Nombres

Tomeguín de la tierra es su nombre en Cuba occidental, y en el oriente del país se le llama viudito. En latín Tiaris significa “con ornamento de cabeza” y olivaceus “oliváceo”.

En Costa Rica se conoce como gallito ya que es un ave muy territorial y pelea como un gallo fino de pelea.

Semillero cariamarillo en Colombia

Hábitat

Frecuenta sabanas, matorrales, o espesuras de malezas en áreas agropecuarias. En Cuba es común en casi todo el país, desde el nivel del mar hasta elevaciones medianas, y en algunos casos puede encontrarse incluso cerca de los asentamientos humanos.

Descripción

Mide unos 11 cm. Es verde olivo por el dorso y grisáceo por abajo. El pico es gris oscuro y los ojos castaños. El macho tiene sobre el pico y los ojos a modo de cejas, dos manchas amarillo-anaranjado y en la garganta una gran mancha del mismo color. Tiene el pecho negro, color que se expande con la edad. La hembra tiene las “cejas” y la garganta de color amarillo claro, y no tiene el pecho negro sino gris parduzco. El inmaduro es como la hembra pero con el amarillo de las cejas y la garganta aún más pálido. Se alimentan de semillas gramíneas, pequeñas frutas y retoños.

Reproducción

Anida a lo largo de todo el año. El nido es globoso con entrada lateral, construido con pajas, fibras, raicillas y pelos. La puesta es de dos o cuatro huevos blancuzcos algo azulosos que en el extremo más grueso tienen manchas moradas y castañas.

En cautividad

Hay una gran variedad de tipos de canto desde el canto campanilla puro ya casi extinto por su alto valor, campanilla liso (campanilla con canto corriente) , canto timbrado se caracteriza por ser un canto mas metálico estos cantos que se encuentra en las partes templadas de Centroamérica y el canto corriente o grillo con una gran variedad desde canto grueso o fino como se encuentra más que todo en las partes calientes.Es de los pájaros que en Cuba más comúnmente se cazan para enjaular. Muchos mueren por cada uno que logra adaptarse al cautiverio. No todos tienen la capacidad de adaptarse fácilmente por lo que su discriminación es aún mayor debido a su cotizado canto.

Yellow-faced grassquit

The yellow-faced grassquit (Tiaris olivaceus) is a passerine bird from the Central American tropics and surrounding regions. It was formerly allied with the American sparrows and placed in Emberizidae; actually, however, it is one of the tholospizan «finches» which are specialized tanagers (Thraupidae). As such, it is closely related to the famous Darwin’s finches.

Description

It is a small bird with a conical bill, sharper than that of the related seedeaters. It is 10–10.7 cm (3.9–4.2 in) long and weighs about 8–10 g (0.28–0.35 oz), depending on subspecies. The adult male has an olive-green back, and its face and breast are black apart from a bright yellow throat, supercilia, and lower eyelid spot. The rest of the underparts are greyish olive. The beak and eyes are dark, the legs are grey.

The adult female is slightly smaller on average than the male. It is dull olive-green above and paler grey below, and may have some dark breast smudges. The yellow face pattern is much weaker and duller, and may be almost invisible. The lower part of the beak is dark horn-colored (light grey). Young birds are coloured essentially like the adult female, but duller and greyer. Young males begin to acquire full adult plumage in their first year.

The yellow-faced grassquit has a weak buzzing trilled ttttt-tee call. The song is a varying series of high thin rapid trills. Given for a prolonged time, it is melodious, yet subdued, and often only heard from a short distance away.

Distribution and ecology

It breeds from central Mexico to northern Ecuador and north-western Venezuela, and also on the Greater Antilles and nearby islands (e.g. the Cayman Islands and Jamaica). It is not a migratory bird but moves about outside the breeding season; vagrants have been recorded in the United States. It has been introduced to Hawaiʻi.

The yellow-faced grassquit is a common to abundant resident in lowlands and foothills up to 2,300 m (7,500 ft) altitude in semi-open areas such as roadsides, pasture, weedy fields and low scrub. It avoids dry grassland and other very low growth, but will readily utilize neglected gardens where lawn grass has grown high. It is a fairly sociable bird, sometimes forming loose flocks with other tanagers (such as seedeaters) and emberizids that share its lifestyle. Occasionally, adult males will come together to perch in a shrub and sing.

This species feeds mainly on grass seeds, but also takes other seeds, berries and some insects. Food is typically plucked from the inflorescences directly, or gathered from the ground. Animal prey is hunted among foliage in a New World warbler-like fashion.

The main breeding season is in the summer months, but except for February to April birds may nest at other times of the year. This species sometimes forms loose nesting colonies. During courtship, the male vibrates his wings as he sings his subdued song, sitting only 1–2 in (2.5–5.1 cm) away so the female can properly hear him. The roughly globular nest, built by the female, is made of grass and weed stems compacted into a thick mass, and lined with pieces of grass inflorescences and bast fibre. It has a side entrance and is placed usually less than 30 cm (12 in) above the ground, often among grass or weeds on a road or river embankment. Occasionally, the species nests in shrubs up to 1.5 m (4.9 ft) above the ground. The clutch is two or three, rarely four, brown-speckled white eggs. They are incubated by the female alone for 12–14 days to hatching.

This bird is not rare and widely distributed; it is thus classified a species of least concern by the IUCN. It seems to benefit from deforestation, increasing in numbers and expanding its range; for example, it is only since 1997 known from the eastern Andean slope of Meta Department in Colombia.