Southern Boubou
Encyclopedia
The Southern Boubou('ferrugineus' - rust-coloured) is a bushshrike
. This family of passerine
bird
s is closely related to the true shrike
s in the family Laniidae, and were once included in that group.
This species is found in southeastern Africa
, mainly in southeastern Zimbabwe
, eastern Botswana
, Mozambique
and southern and eastern South Africa
. It frequents dense thickets in forests, mangrove
s, scrub and gardens. In drier regions, it is found in riverside woodland.
The nest, built mainly by the female, is a shallow cup in a creeper or dense bush into which the usually two brown-blotched greenish-white egg
s are laid. Both sexes incubate for 16–17 days to hatching, and both bring food to the chicks. Fledging takes place in about another 16 days. About 2% of nests are parasitised
by the Black Cuckoo
.
, Lanius collaris, but is shorter tailed, has more white in the wing, and is much less conspicuous in its habits.
The female is similar to the male, but dark grey above and with a rufous wash to the breast. Young birds are like the female, but mottled buff-brown above, have a buff wash to the wing bar, and are barred below.
The rufous on the underparts, which gives this species its scientific name, distinguishes it from the Tropical
and Swamp Boubous.
There are six subspecies, differing in size, upperpart colour, the extent of rufous on the underparts, and the degree of sexual dimorphism
.
The Southern Boubou has a duetted call, with a ooo-whee-ooo, followed by a whistled ooo-ooo-wheee or wheee-wheee followed by ooo-whee-ooo. The duet has many variations and the liquid ooo-whee-ooo call is often mistaken for that of the Black-headed Oriole
. Its alarm call is a muted cluck.
s, taken from the ground or picked off vegetation as the bird creeps low in bushes. It will also take small rodents, lizards snail
s and fruits.
Bushshrike
The bushshrikes are smallish passerine bird species. They were formerly classed with the true shrikes in the family Laniidae, but are now considered sufficiently distinctive to be separated from that group as the family Malaconotidae....
. This family of passerine
Passerine
A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: with over 5,000 identified species, it has roughly...
bird
Bird
Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...
s is closely related to the true shrike
Shrike
Shrikes are passerine birds of the family Laniidae. The family is composed of thirty-one species in three genera. The family name, and that of the largest genus, Lanius, is derived from the Latin word for "butcher", and some shrikes were also known as "butcher birds" because of their feeding habits...
s in the family Laniidae, and were once included in that group.
This species is found in southeastern Africa
Africa
Africa is the world's second largest and second most populous continent, after Asia. At about 30.2 million km² including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area...
, mainly in southeastern Zimbabwe
Zimbabwe
Zimbabwe is a landlocked country located in the southern part of the African continent, between the Zambezi and Limpopo rivers. It is bordered by South Africa to the south, Botswana to the southwest, Zambia and a tip of Namibia to the northwest and Mozambique to the east. Zimbabwe has three...
, eastern Botswana
Botswana
Botswana, officially the Republic of Botswana , is a landlocked country located in Southern Africa. The citizens are referred to as "Batswana" . Formerly the British protectorate of Bechuanaland, Botswana adopted its new name after becoming independent within the Commonwealth on 30 September 1966...
, Mozambique
Mozambique
Mozambique, officially the Republic of Mozambique , is a country in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi and Zambia to the northwest, Zimbabwe to the west and Swaziland and South Africa to the southwest...
and southern and eastern South Africa
South Africa
The Republic of South Africa is a country in southern Africa. Located at the southern tip of Africa, it is divided into nine provinces, with of coastline on the Atlantic and Indian oceans...
. It frequents dense thickets in forests, mangrove
Mangrove
Mangroves are various kinds of trees up to medium height and shrubs that grow in saline coastal sediment habitats in the tropics and subtropics – mainly between latitudes N and S...
s, scrub and gardens. In drier regions, it is found in riverside woodland.
The nest, built mainly by the female, is a shallow cup in a creeper or dense bush into which the usually two brown-blotched greenish-white egg
Egg (biology)
An egg is an organic vessel in which an embryo first begins to develop. In most birds, reptiles, insects, molluscs, fish, and monotremes, an egg is the zygote, resulting from fertilization of the ovum, which is expelled from the body and permitted to develop outside the body until the developing...
s are laid. Both sexes incubate for 16–17 days to hatching, and both bring food to the chicks. Fledging takes place in about another 16 days. About 2% of nests are parasitised
Brood parasite
Brood parasites are organisms that use the strategy of brood parasitism, a kind of kleptoparasitism found among birds, fish or insects, involving the manipulation and use of host individuals either of the same or different species to raise the young of the brood-parasite...
by the Black Cuckoo
Black Cuckoo
The Black Cuckoo is a species of cuckoo in the Cuculidae family. The species is distributed widely across sub-Saharan Africa...
.
Identification
The male Southern Boubou is a fairly distinctive 20–22 cm long bird with black upperparts extending from the top of the head down to the tail, a striking white wing stripe, and a relatively long black tail with white outer feathers. The underparts are white shading to rufous on the lower belly, undertail and flanks. The bill, eyes and legs are black. It resembles the Common FiscalCommon Fiscal
The Common Fiscal is a member of the shrike family found through most of Sub-Saharan Africa. It is also sometimes named Fiscal Shrike, as well as Jackie Hangman or Butcher Bird due to its habit of impaling its prey on acacia thorns to store the food for later consumption. It is sometimes split...
, Lanius collaris, but is shorter tailed, has more white in the wing, and is much less conspicuous in its habits.
The female is similar to the male, but dark grey above and with a rufous wash to the breast. Young birds are like the female, but mottled buff-brown above, have a buff wash to the wing bar, and are barred below.
The rufous on the underparts, which gives this species its scientific name, distinguishes it from the Tropical
Tropical Boubou
The Tropical Boubou or Bell Shrike is a medium-sized passerine bird of sub-Saharan Africa. This very diverse "species" with its numerous subspecies and morphs has since long posed a taxonomic problem, and recent research suggests it is a cryptic species complex that ought to be split into several...
and Swamp Boubous.
There are six subspecies, differing in size, upperpart colour, the extent of rufous on the underparts, and the degree of sexual dimorphism
Sexual dimorphism
Sexual dimorphism is a phenotypic difference between males and females of the same species. Examples of such differences include differences in morphology, ornamentation, and behavior.-Examples:-Ornamentation / coloration:...
.
The Southern Boubou has a duetted call, with a ooo-whee-ooo, followed by a whistled ooo-ooo-wheee or wheee-wheee followed by ooo-whee-ooo. The duet has many variations and the liquid ooo-whee-ooo call is often mistaken for that of the Black-headed Oriole
Black-headed Oriole
The Black-headed Oriole is an African passerine.It has a very striking appearance with a bright yellow body, contrasting black head and flesh-coloured beak....
. Its alarm call is a muted cluck.
Behaviour
Unlike the true shrikes, which perch conspicuously in the open, the Southern Boubou prefers to forage in dense vegetation close to the ground, a habit which has led to its being called shy and skulking. The food is mainly insectInsect
Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...
s, taken from the ground or picked off vegetation as the bird creeps low in bushes. It will also take small rodents, lizards snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
s and fruits.