| Grasshopper buzzard | |
|---|---|
 | |
| in Kibale forest National Park, Uganda | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Accipitriformes |
| Family: | Accipitridae |
| Genus: | Butastur |
| Species: | B. rufipennis |
| Binomial name | |
| Butastur rufipennis (Sundevall, 1850) | |
| Synonyms | |
| |
The grasshopper buzzard (Butastur rufipennis) is a species of bird of prey in the family Accipitridae which is found in a narrow zone of sub-Saharan Africa north of the equator.
The grasshopper buzzard forms a superspecies with the white-eyed buzzard (Butastur teesa), rufous-winged buzzard (Butastur liventer), and grey-faced buzzard (Butastur indicus) all of which occur in Asia. [2]
The adult grasshopper buzzard is grey brown above with a darker head and dark shaft streaks on all of its feathers. The feathers of the mantle and lesser coverts are narrowly with fringed rufous in fresh plumage, although this wears off. The grey tail has faint brown bars. The greater coverts and primary feathers are light rufous, the primaries are tipped with black, and form a conspicuous reddish patch in flight. The secondary feathers are rufous shading to dark brown towards the tip, which is white. The chin and throat are whitish, with three black streaks on either side of throat. The breast is rufous and has narrow shaft streaks of black, the belly and thighs are also rufous but lack markings. The axillary feathers are greyish brown, spotted with white or buff. The under wing coverts and wing lining are white. The eyes, legs, and cere are yellow. The bill has a black tip and a yellow base. The female is slightly larger than the male. Juveniles have a bright brownish-red head and nape with dark shaft streaks, and as they age, the crown becomes the same colour as the back, the tail acquires bars, and the rufous edges on the mantle and coverts become less distinct. [3] The length of the grasshopper buzzard is 30–35 cm (12–14 in); the wingspan: 90 cm (35 in) and the weight is 310–340 g (11–12 oz) for the males and 300–380 g (11–13 oz) for the females. [4]
Grasshopper buzzards usually frequent woodland and forest edges, and arid acacia savannahs. It also can be found in marshes’ edges and over burnt areas. [4]
Afrotropical. Senegal and Gambia east to Ethiopia, migrating south to Sierra Leone, Cameroon, northeastern Democratic Republic of Congo, Kenya, and northern Tanzania. [2]
The grasshopper buzzard is a partial migrant which moves south in the dry northern winter, i.e. September to March, and north again in summer with the rains, April to September to breed. In general, this species ranges between about 9-15° N when breeding, south to 5° N in the dry season, it only occurs south of the equator in eastern Africa. There is much local and even annual variation in distribution and abundance. [2]
The grasshopper buzzard feeds mainly on insects although it will also take small birds, rodents and reptiles. It hunts from a low perch, looking for large insects, which are its main prey, catching them on the ground, or sometimes on the wing after a brief aerial chase. The grasshopper buzzard is quite sociable and is often seen in groups of 50 to 100 birds, most frequently in recently burnt areas where there are insect emergences. [4] Grasshopper buzzards are specialists in catching grasshoppers during the non-breeding season; when breeding they consume a range of insects, mostly grasshoppers and beetles, also scorpions and sun spiders. The bulk of their breeding season diet is dominated by reptiles and other vertebrates: frogs, rodents, and birds are also regularly taken during this time. [5]
Breeding season for grasshopper buzzards is between March and May in the northern part of the range, but laying depends on the region. The nest is placed in a fork of tree, in low tree, or sometimes at about 10 metres (33 ft) above the ground in taller trees. The nest is made with sticks, with a cup in the centre, lined with green leaves. One to three bluish-white eggs, with some dark markings, are laid. The details of the incubation and nesting behaviour are not known although fresh green leaves are added to the nest throughout the nesting period. [4]
Grasshopper buzzards occur at quite high densities with up to 3.3 nests per square kilometre and with distances between nests of less than 100 metres (330 ft) in high-quality habitat. The home ranges overlap and birds regularly fly over neighboring territories on foraging flights. [5]
The common buzzard is a medium-to-large bird of prey which has a large range. It is a member of the genus Buteo in the family Accipitridae. The species lives in most of Europe and extends its breeding range across much of the Palearctic as far as northwestern China, far western Siberia and northwestern Mongolia. Over much of its range, it is a year-round resident. However, buzzards from the colder parts of the Northern Hemisphere as well as those that breed in the eastern part of their range typically migrate south for the northern winter, many journeying as far as South Africa.
The fieldfare is a member of the thrush family Turdidae. It breeds in woodland and scrub in northern Europe and across the Palearctic. It is strongly migratory, with many northern birds moving south during the winter. It is a very rare breeder in Great Britain and Ireland, but winters in large numbers in the United Kingdom, Southern Europe, North Africa and the Middle East. It is omnivorous, eating a wide range of molluscs, insects and earthworms in the summer, and berries, grain and seeds in the winter.
The isabelline wheatear is a small passerine bird that was formerly classed as a member of the thrush family Turdidae, but is now more generally considered to be an Old World flycatcher in the family Muscicapidae. It is a migratory insectivorous bird. Its habitat is steppe and open countryside and it breeds in southern Russia and Central Asia to northern Pakistan, wintering in Africa and northwestern India. It is a very rare vagrant to western Europe.
Buzzard is the common name of several species of birds of prey.
The rufous-tailed scrub robin is a medium-sized member of the family Muscicapidae. Other common names include the rufous scrub robin, rufous bush chat, rufous bush robin and the rufous warbler. It breeds around the Mediterranean and east to Pakistan. It also breeds south of the Sahara from the Sahel region east to Somalia; these African birds are sometimes considered to be a separate species, the African scrub robin. It is partially migratory, wintering in Africa and India. This is a very rare visitor to northern Europe.
The long-legged buzzard is a bird of prey found widely in several parts of Eurasia and in North Africa. This species ranges from Southeastern Europe down to East Africa to the northern part of the Indian subcontinent. The long-legged buzzard is a member of the genus Buteo, being one of the larger species therein. Despite being relatively powerful, it is considered a rather sluggish raptor overall. Like most buzzards, it prefers small mammals such as rodents, including gerbils, ground squirrels, voles and rats, also taking reptiles, birds and insects as well as carrion. Adaptable to a variety of habitats, long-legged buzzards may nest on a variety of surfaces, including rocks, cliffs and trees. it is a typical buzzard in its reproductive biology. The long-legged buzzard is widely distributed and appears to be quite stable in population. Therefore, it is considered as Least Concern by the IUCN.
The square-tailed kite is a medium-sized bird of prey in the family Accipitridae, which also includes many other diurnal raptors such as kites, eagles and harriers.
The yellow-legged buttonquail is a buttonquail, one of a small family of birds which resemble, but are unrelated to, the true quails. This family is peculiar in that the females are larger and more colourful than the males and are polyandrous.
The white-eyed buzzard is a medium-sized hawk, distinct from the true buzzards in the genus Buteo, found in South Asia. Adults have a rufous tail, a distinctive white iris, and a white throat bearing a dark mesial stripe bordered. The head is brown and the median coverts of the upper wing are pale. They lack the typical carpal patches on the underside of the wings seen in true buzzards, but the entire wing lining appears dark in contrast to the flight feathers. They sit upright on perches for prolonged periods and soar on thermals in search of insect and small vertebrate prey. They are vociferous in the breeding season, and several birds may be heard calling as they soar together.
The Malagasy kestrel, also known as the Madagascar kestrel, Malagasy spotted kestrel, Newton's kestrel, Madagascar spotted kestrel, katiti (Creole) or hitsikitsika (Malagasy), is a small bird of prey of the genus Falco. It is named after British ornithologist Edward Newton. It occurs in two subspecies on Madagascar and at Aldabra. The race from Aldabra is also called Aldabra kestrel. Its closest living relative is the Seychelles kestrel; they were at one time considered conspecific. Their common ancestors appear to have diverged very recently, probably less than 1 million years ago during the Early or Middle Pleistocene. The Mauritius kestrel is more distantly related.(Groombridge et al. 2002)
The grey-faced buzzard is an Asian bird of prey. It is typically 41–46 cm (16–18 in) in length, making it a small-sized raptor. It breeds in Manchuria, Korea and Japan; it winters in South-east Asia.
The jackal buzzard is a fairly large African bird of prey. The taxonomy of this species has caused some confusion in the past and it almost certainly belongs in a species complex with other African Buteo species. Some taxonomists have considered this species, the Archer's buzzard, and the augur buzzard to be the same superspecies. Many taxonomists consider them all to be distinct, having different calls, different home ranges and variations in plumage. This is a species that lives among mountains, and on adjacent savanna and grassland. It is resident and non-migratory throughout its range.
The augur buzzard is a fairly large African bird of prey. This species is distinct in typical adult plumage for its blackish back, whitish underside and orange-red tail, while juvenile augur buzzards are generally rather brown in colour; however a dark morph is known, which causes the bird's entire body to become darker. This member of the Buteo genus is distributed in several parts of the central and southern Africa, normally being found from Ethiopia to southern Angola and central Namibia. It is resident and non-migratory throughout its range. This is a species of mountains, and adjacent savannah and grassland. This is a typical buteonine raptor, being a generalist predator which tends to prefer small mammals supplemented by reptiles and birds among various prey items.
The rufous-winged buzzard is an Asian bird of prey. It is a resident breeder of Indochina, Java and Sulawesi. It is a species of deciduous forest and second growth up to 800 m.
The spotted nightjar or spotted eared-nightjar is a species of nightjar in the family Caprimulgidae. It inhabits much of mainland Australia and has also been found in several Indonesian islands. Its natural habitats are open forests and woodlands, scrub, spinifex and tussock grassland, savannah woodland and mangroves.
The rufous-winged ground cuckoo is a species of cuckoo in the tribe Neomorphini of subfamily Crotophaginae. It is found in Brazil, Guyana, Venezuela, and possibly Colombia.
The white-browed robin-chat, also known as Heuglin's robin, is a species of bird in the family Muscicapidae. Found in east, central and southern Africa, its natural habitats include riverine forest and thickets, and it is also found near humans. The IUCN classifies it as a least-concern species.
The stripe-crowned spinetail is a species of bird in the Furnariinae subfamily of the ovenbird family Furnariidae. It is found in Argentina, Bolivia, Brazil, Paraguay, and Uruguay.
The grey-backed shrike is a bird in the family Laniidae inhabiting South-east Asia.
The bronze-winged courser or violet-tipped courser is a species of bird in the family Glareolidae. This species is named for its characteristic bronze-tipped feathers that are visible during flight. It is found living throughout Sub-Saharan Africa, inhabiting semi-arid savannas and woodlands. This is a nocturnal species which mainly feeds on ground-dwelling insects. Bronze-winged coursers are typically solitary, only forming monogamous pairs for breeding. A female may produce 2-3 eggs per clutch, and the chicks receive parental care from both sexes when young. The bronze-winged courser is considered of Least Concern for conservation status, and is thought to be a very stable species.
