Showing posts with label Genus Neotis. Show all posts
Showing posts with label Genus Neotis. Show all posts

Friday, August 24, 2012

>Neotis denhami (Denham's Bustard)

Denham's Bustard

Denham's Bustard
Conservation status

Near Threatened (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gruiformes
Family:Otidae
Genus:Neotis
Species:N. denhami
Binomial name
Neotis denhami
(Children & Vigors, 1826)
Synonyms
Neotis cafra denhami
Denham's BustardStanley Bustard or Stanley's BustardNeotis denhami, is a large bird in the bustard family. It breeds in much of sub-Saharan Africa. It is a species of open ground, including agricultural land, grassland, flood-plains and burnt fynbos. It is resident, but some inland populations move to lower altitudes in winter.
Denham's Bustard is the largest species in the Neotis genus, although is smaller than the bustards in the Ardeotis genus (as well as the Great Bustard). The male is 9 to 10 kg (20 to 22 lb) and 100–116 cm (39–46 in), the female is much smaller at 3 to 4 kg (6.6 to 8.8 lb) and 80–87 cm (31–34 in). The back is brown, darker and plainer in the male, and the underparts are white. The neck is pale grey with an orange nape, and the head has black stripes on the crown. The long legs are pale yellow. The wings are strikingly patterned in brown, white and black, the male showing more white in flight than the female or young birds.
The male inflates his throat when displaying to show a conspicuous balloon of white feathers. This species is usually silent.
Denham's Bustard feeds on insects, small vertebrates and plant material. It has suffered population declines through much, if not all, of its range. Hunting is the primary cause of declines across the Sahel and west Africa, but in eastern and southern Africa, conversion of grassland to agriculture is a greater threat.
The common names for this species refer to the English explorer, Major Dixon Denham, and the English naturalist Edward Smith-Stanley, 13th Earl of Derby

>Neotis nuba (Nubian Bustard)

Nubian Bustard


Nubian Bustard
Conservation status

Near Threatened (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gruiformes
Family:Otididae
Genus:Neotis
Species:N. nuba
Binomial name
Neotis nuba
(Cretzschmar, 1826)
General range: Sahelian Acacia savanna
The Nubian Bustard (Neotis nuba) is a species of bird in the bustard family. This is a medium-large bustard found in the sparsely vegetated interface between the southern margins of the Sahara desert and the northern part of the Sahel. It is found in Burkina Faso,Cameroon, Chad, Mali, Mauritania, Niger, Nigeria, and Sudan. Its natural habitats are dry savanna and subtropical or tropical dry shrubland.

Description

In this species, males average around 5–7 kg (11–15 lb) and measure around 80 cm (31 in) in length and 180 cm (71 in). Females are much smaller at around 3 kg (6.6 lb) and 60 cm (24 in) in length and 150 cm (59 in) across the wings. In males the forehead, crown and upperparts are tawny-buff marked with black. A broad black band extends over the eyes. The rest of the face is white except for the chin and throat which are black. The upperparts are pale tawny buff, lightly vermiculated with black. Tail is similar but more grey. The lower hindneck and sides of breast are bordered by a black line. In adult females plumage is similar but colors generally less intense and mantle faintly streaked. It is smaller than the sympatric Arabian Bustard, as well as more rufous with a different body shape. Compared to larger bustards the Nubian has a more rounder body, a relatively long, thin neck and a rounded head.

Life History

Observation of breeding has occurred from July to October have been reported across the species’ range. Males undertake elaborate displays on selected high points or dune ridges during the breeding season. Displays can entail throwing out the breast, pulling the head back, raising the tail and lowering the wings to display a contrasting white and dark pattern, while strutting repeatedly back and forth along the skyline. The clutch size is 2-3 eggs, which are laid in a simple scrape on the ground under or near low shrubs or tussocks of grass. Adult birds will engage in active diversionary tactics to draw would be predators away from eggs and chicks. Immature birds may be ‘parked’ whilst adults forage for food. Mixed groups of adult and immature birds, up to a dozen or more in number, have been observed following the breeding season.
This bird is believed mainly feed on insects but seeds, fruit and Acacia tree gum may supplement the diet. The main predator of this species are eagles such as the Golden Eagle or the Short-toed Snake Eagle. Young birds and eggs are threatened by a wider range of predators, including mammalian carnivores and reptiles.

Conversation

Classified as Near-Threatened by the IUCN, its main threat is habitat loss. The species population may additionally be negatively affected from widespread hunting (mostly related to falconry activities), civil wars, intensification of land use, disturbance by off-road vehicles, overgrazing, disturbance by livestock, firewood collection and commercial wood collection all of which may now be causing substantial declines in parts of its range.

>Neotis ludwigii (Ludwig's Bustard)

Ludwig's Bustard

Ludwig's Bustard
Conservation status

Endangered (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gruiformes
Family:Otididae
Genus:Neotis
Species:N. ludwigii
Binomial name
Neotis ludwigii
(Rüppell, 1837)
The Ludwig's Bustard (Neotis ludwigii) is a species of bird in the bustard family, and named after Baron von Ludwig. It is a medium-to-large sized species. It is found in Angola,Botswana, Lesotho, Namibia, and South Africa. Its habitats include semi-arid grasslands.
The Ludwig's Bustard can weigh from 3 to 7.3 kg (6.6 to 16 lb), with a mean of 6.3 kg (14 lb) for the much larger male and 3.4 kg (7.5 lb) for the female. Length ranges from 76 to 85 cm (30 to 33 in) in females and 80 to 95 cm (31 to 37 in) in males. It lives largely on large insects (mainly locusts), as well as flowers and seeds. Although it lives in semi-arid areas it seems to shift locally to follow the presence of rainfall. During extreme concentrations of rainfall, as many as 230 Ludwig's Bustards have been seen at once feeding on locusts.
This little-known species is now considered endangered. It is thought to be the bird species in Southern Africa most seriously at risk of dying from collisions with power lines.

>Neotis heuglinii (Heuglin's Bustard)

Heuglin's Bustard






Heuglin's Bustard
Conservation status

Least Concern (IUCN 3.1)
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gruiformes
Family:Otididae
Genus:Neotis
Species:N. heuglinii
Binomial name
Neotis heuglinii
(Hartlaub, 1859)
Heuglin's Bustard Neotis heuglinii is a species of bird in the bustard family. It is a fairly large species, at up to 89 cm (35 in) in length. The males weigh 4–8 kg (8.8–18 lb) and the much smaller females weigh 2.6–3 kg (5.7–6.6 lb). It is It is found in Djibouti, Eritrea,Ethiopia, Kenya, and Somalia.

>>Genus Neotis

Neotis




Neotis
Ludwig's Bustard
Scientific classification
Kingdom:Animalia
Phylum:Chordata
Class:Aves
Order:Gruiformes
Family:Otididae
Genus:Neotis
Sharpe, 1893
Neotis is a genus of bird in the Otididae family. It contains the following species:
  • Heuglin's Bustard (Neotis heuglinii)
  • Ludwig's Bustard (Neotis ludwigii)
  • Nubian Bustard (Neotis nuba)
  • Denham's Bustard (Neotis denhami)