Agachadiza Pintada Grande

Identificación

The greater painted-snipe are medium-sized shorebirds found in wetland habitat. The birds display sexual dimorphism: females of the species are larger, heavier, and have bolder plumage than the males (see image, left). The females have "dark bronze green upperparts", and an area of castaneous feathers that extends from the lower head area to the chest. They also have a large white eyepatch. By contrast, the males are largely mottled grey and brown, with buff-coloured upper parts. This gives them very strong camouflage when they are in their nests.

Taxonomía

The greater painted-snipe was first described by Carl Linnaeus. The related species Rostratula australis of Australia is endangered, and was formerly a subspecies of R. benghalensis.

Nombre científico

Rostratula benghalensis

Autoridad

(Linnaeus, 1758)

Orden

Charadriiformes

Familia

Rostratúlidos

Género

Rostratula

Distribución y hábitat

Greater painted-snipe are very widely distributed; in mainland Africa as well as Madagascar and the Seychelles; in India, and Southeast Asia. Within Africa, they are found in the Nile River Valley and in the non-rainforested areas of Sub-Saharan Africa. They are notably absent from the eastern portion of Somalia, from the desert areas of Namibia, and from parts of Botswana and South Africa. Despite their wide distribution, they are uncommon within their range. There are between 31,000 and 1,000,000 mature individuals alive, according to BirdLife International. Although the greater painted-snipe inhabit a variety of wetland habitats, they prefer muddy areas with available cover (i.e., vegetation). They are also found on the edges of lakes and rivers, provided there is cover nearby, and in marshes and around swamps.

Migración

Resident species

Comportamiento

The greater painted-snipe is not a vocal species; apart from the breeding season, they are mostly silent. Females may make a "mellow hooting or booming" sounds to males.<p>They are usually found close to the fringes of reed beds along shorelines of marshes, swamps, ponds and streams.<p>Greater painted-snipe usually live solitarily or in pairs, but sometimes are found in large groups. They are rather shy and retiring, skulking close to the vegetation so that they can retreat to cover if disturbed. When flushed, the birds like rails, with their legs dangling.<p>Greater painted-snipe are almost always polyandrous. The female initiates courtship and usually mates with two males in a season, but may mate with up to four. Males of the species incubate the eggs and give parental care.<p>They feed on insects, crustaceans, molluscs and seeds.<p>The females court the males, are polyandrous with males incubating and raising the young. Chicks are buff coloured and have black stripes running along their length. Immature birds resemble the male but lack the broken dark band across the breast. Males are also known to carry the chicks to safety under the wings.[citation needed]<p>The birds are almost always polyandrous, but they may act monogamously in regions where their population density is especially low, such as in South Africa.<p>The nest is usually a shallow scrape in soft ground, lined with plant material and situated among grass or reeds at the water's edge; sometimes a pad of vegetation or a nest of grass and weeds. The breeding season is between April and July.[citation needed]

Conservación

R. benghalensis is as "Least Concern" by the IUCN, due to its large range and the relatively slow rate of population decrement.

Tendencia poblacional

declining