Tórtola collareja

Identificación

Their body feathers are darkest on the upper side, where they are coloured in dull tones of grey and brown, with shades of lavender on the nape. It is paler below, where a tint of pinkish lavender is usually present. The lower belly and crissum (the undertail coverts surrounding the cloaca) is white. As with related species, they have white fringes and conspicuous white tips to the otherwise slate grey tail feathers. The tail pattern is particularly noticeable during the display flight.<p>Individual plumage variation is high, with some light and others almost sooty. Males and females look alike, although the males are slightly bigger. They measure 25–26.5 cm (9.8–10.4 in) in length and weigh 92–188 g (3.2–6.6 oz). The eyes are almost black, the bill is black and the feet are dark purple.<p>An immature is duller and lacks the semi-collar of an adult. It also has buff edges to all the upper part and wing covert feathers, while the plumage below is broadly edged greyish-white.

Taxonomía

Nombre científico

Streptopelia capicola

Autoridad

(Sundevall, 1857)

Orden

Columbiformes

Familia

Columbidae

Género

Streptopelia

Distribución y hábitat

It occupies a diverse range of habitat types, including semi-desert scrub, Boscia and Acacia savannah, a variety of woodland types, farmlands, open plantations and alien acacia thickets. Only closed forest or plantations, or the extensive waterless dune fields and gravel plains of the Namib are unsuited to their requirements. In southern Africa, they are most commonly observed in fynbos regions, miombo and mopane woodlands, besides any grassland types from moist to dry regions. Their presence in the latter areas has been facilitated by the planting of trees in groves, for instance around farm homesteads.<p>They are vulnerable at exposed waterholes or in plantations, where they are preyed on by lanner falcons and black sparrowhawks, respectively. In addition, they are preyed on by reptiles, wildcats, jackals, genets, herons, storks, eagles and barn owls. Nests are vulnerable to birds, snakes and, in Cape Town, eastern grey squirrels that were introduced.<p>Seasonal movements are most noticeable in tropical areas, while nomadic movements occur in arid environments with limited resources. They seldom occur above 2,000 metres.

Migración

Complete migrants

Conservación

Tendencia poblacional

rising