Denham's bustard | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Chordata |
Class: | Aves |
Order: | Otidiformes |
Family: | Otididae |
Genus: | Neotis |
Species: | N. denhami |
Binomial name | |
Neotis denhami | |
Extant (resident) Extant (non-breeding) | |
Synonyms | |
Neotis cafra denhami |
Denham's bustard, Stanley bustard or Stanley's bustard (Neotis 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. 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.
Denham's bustard is the largest species in the genus Neotis , although is smaller than the bustards in the genus Ardeotis (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). [3] [4] The back is brown, darker and plainer in the male, and the underparts are white. The neck is pale grey with an orange nape. Its grey crown is bordered with black, and a black line runs through the eye with a white line forming an eyebrow above. 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 long legs are yellowish in color and the bill is whitish horn in color. [5]
The male inflates his throat when displaying to show a conspicuous balloon of white feathers. This species is usually silent.
There are three subspecies of this bustard, all separated in their distribution. N. d. denhami occurs in southwestern Mauritania, Senegal and Gambia then eastwards to Uganda and Ethiopia. N. d. jacksoni is found in Kenya and Tanzania and south to Zambia, Botswana and Zimbabwe, with populations also in Angola, and the Democratic Republic of Congo. N. d. stanleyi occurs in South Africa and Eswatini. The Denham's bustard occupies grassland habitats. Mainly they are distributed in savanna and may be found at any elevation up to 3,000 m (9,800 ft). They can be found in a considerable range of secondary habitats including dense shrubland, light woodland, farmland, dried marsh and arid plains. [5]
Denham's bustard are often solitary outside of the mating season, although they congregate at large food sources and temporarily band together for migratory movements. Migration is usually in search of food sources and follows passages of rain. This species is omnivorous, feeding on a wide variety of foods as it becomes available to them. Among the diverse foods recorded in the species are insects, small snakes, rodents, the nestlings of other birds and various green plant life. They will sometimes follow ungulate species in order to pick dung beetles out of their droppings. [5]
Like all bustards, the male Denham's bustard performs a courtship display to attract the attention on females, on what is called a lek. During his display, the male puffs up his head and chest and flairs his tail, thus appearing larger, and calls loudly while he struts about. Breeding occurs over varied times of the year, being especially undefined in East Africa. Breeding may brought on by presence of rainfall. The nest consists of a shallow scrape, in which the female lays one or two eggs, which (if they survive) she will raise alone. [6]
It has suffered population declines through much, if not all, of its range. Countries including South Africa, Kenya and Nigeria have had a sharp decrease in population. 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. In some areas, the conversion of grassland into commercially logged forest has become a threat for the species. [7] [8]
Bustards, including floricans and korhaans, are large, terrestrial birds living mainly in dry grassland areas and on the steppes of the Old World. They range in length from 40 to 150 cm. They make up the family Otididae.
The kori bustard is the largest flying bird native to Africa. It is a member of the bustard family, which all belong to the order Otidiformes and are restricted in distribution to the Old World. It is one of the four species in the large-bodied genus Ardeotis. In fact, the male kori bustard may be the heaviest living animal capable of flight.
The great Indian bustard or Indian bustard, is a bustard occurring on the Indian subcontinent. A large bird with a horizontal body and long bare legs, giving it an ostrich like appearance, this bird is among the heaviest of the flying birds. Once common on the dry plains of India, as few as 150 individuals were estimated to survive in 2018 and the species is critically endangered by hunting and loss of its habitat, which consists of large expanses of dry grassland and scrub. These birds are often found associated in the same habitat as blackbuck. It is protected under the Wild life Protection Act, 1972 of the Parliament of India.
The martial eagle is a large eagle native to sub-Saharan Africa. It is the only member of the genus Polemaetus. A species of the booted eagle subfamily (Aquilinae), it has feathering over its tarsus. One of the largest and most powerful species of booted eagle, it is a fairly opportunistic predator that varies its prey selection between mammals, birds and reptiles. It is one of few eagle species known to hunt primarily from a high soar, by stooping on its quarry. An inhabitant of wooded belts of otherwise open savanna, this species has shown a precipitous decline in the last few centuries due to a variety of factors. The martial eagle is one of the most persecuted bird species in the world. Due to its habit of taking livestock and regionally valuable game, local farmers and game wardens frequently seek to eliminate martial eagles, although the effect of eagles on this prey is almost certainly considerably exaggerated. Currently, the martial eagle is classified with the status of Endangered by the IUCN.
The lesser florican, also known as the likh or kharmore, is the smallest in the bustard family and the only member of the genus Sypheotides. It is endemic to the Indian Subcontinent where it is found in tall grasslands and is best known for the leaping breeding displays made by the males during the monsoon season. The male has a contrasting black and white breeding plumage and distinctive elongated head feathers that extend behind the neck. These bustards are found mainly in northwestern and central India during the summer but are found more widely distributed across India in winter. The species is highly endangered and has been extirpated in some parts of its range such as Pakistan. It is threatened both by hunting and habitat degradation. The only similar species is the Bengal florican which is larger and lacks the white throat, collar and elongated plumes.
The Australian bustard is a large ground-dwelling bird that is common in grassland, woodland and open agricultural country across northern Australia and southern New Guinea. It stands at about one metre high, and its wingspan is around twice that length. The species is nomadic, flying to areas when food becomes plentiful, and capable of travelling long distances. They were once widespread and common to the open plains of Australia, but became rare in regions that were populated by Europeans during the colonisation of Australia. The bustard is omnivorous, mostly consuming the fruit or seed of plants, but also eating invertebrates such as crickets, grasshoppers, smaller mammals, birds and reptiles.
The African marsh harrier is a bird of prey belonging to the harrier genus Circus. It is largely resident in wetland habitats in southern, central and eastern Africa from South Africa north to South Sudan.
The Bengal florican, also called the Bengal bustard, is a bustard species native to the Indian subcontinent, Cambodia, and Vietnam. It is listed as Critically Endangered on the IUCN Red List because fewer than 1,000 individuals were estimated to be alive as of 2017. It is the only member of the genus Houbaropsis.
The African crake is a small- to medium-size ground-living bird in the rail family, found in most of central to southern Africa. It is seasonally common in most of its range other than the rainforests and areas that have low annual rainfall. This crake is a partial migrant, moving away from the equator as soon as the rains provide sufficient grass cover to allow it to breed elsewhere. There have been a few records of vagrant birds reaching Atlantic islands. This species nests in a wide variety of grassland types, and agricultural land with tall crops may also be used.
The rufous-naped lark or rufous-naped bush lark is a widespread and conspicuous species of lark in the lightly wooded grasslands, open savannas and farmlands of the Afrotropics. Males attract attention to themselves by a bold and often repeated wing-fluttering display from a prominent perch, which is accompanied by a melodious and far-carrying whistled phrase. This rudimentary display has been proposed as the precursor to the wing-clapping displays of other bush lark species. They have consistently rufous outer wings and a short erectile crest, but the remaining plumage hues and markings are individually and geographically variable. It has a straight lower, and longish, curved upper mandible.
The Arabian bustard is a species of bustard which is found across the Sahel region of Africa and south western Arabia. It is part of the large-bodied genus, Ardeotis, and, though little known, appears to be a fairly typical species in that group.
The southern black korhaan, also known as the black bustard, is a species of bird in the bustard family, Otididae. This small bustard is found in southwestern South Africa, from Namaqualand, south to Cape Town and east to Makhanda. It prefers semi-arid habitats such as grasslands, shrublands and savannas where it can easily prey on ground-dwelling arthropods and eat seeds. It reproduces yearly in the spring and will lay about one or two eggs per breeding season.
Hartlaub's bustard is a species of bird in the family Otididae. It is found in open grassland with grass up to 1800 meters in Ethiopia, Kenya, Somalia, Sudan, Tanzania, and Uganda.
The little brown bustard is a species of bird in the family Otididae. Found in Ethiopia and Somalia, its natural habitats are subtropical or tropical dry shrubland and subtropical or tropical dry lowland grassland. As indicated by its name, this bustard is the world's smallest at 45 cm (18 in) and 600 grams (1.3 lb). It is threatened by habitat destruction.
The black-bellied bustard, also known as the black-bellied korhaan, is an African ground-dwelling bird in the bustard family.
Heuglin's bustard is a species of bird in the bustard family.
Ludwig's bustard is a species of bird in the bustard family, and named after Baron von Ludwig. It is a medium-to-large sized species.
The Nubian bustard 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.
The cuckoo-finch, also known as the parasitic weaver or cuckoo weaver, is a small passerine bird now placed in the family Viduidae with the indigobirds and whydahs. It occurs in grassland in Africa south of the Sahara. The male is mainly yellow and green while the female is buff with dark streaks. They lay their eggs in the nests of other birds.
The great bustard is a bird in the bustard family, and the only living member of the genus Otis. It breeds in open grasslands and farmland from northern Morocco, South and Central Europe to temperate Central and East Asia. European populations are mainly resident, but Asian populations migrate farther south in winter. Endangered as of 2023, it had been listed as a Vulnerable species on the IUCN Red List since 1996.