The vulturine guinea fowl (''Acryllium vulturinum'') is the largest extant
species
A species () is often defined as the largest group of organisms in which any two individuals of the appropriate sexes or mating types can produce fertile offspring, typically by sexual reproduction. It is the basic unit of Taxonomy (biology), ...
of
guinea fowl
Guinea fowl () (or guineahen) are birds of the family Numididae in the order Galliformes. They are endemic to Africa and rank among the oldest of the gallinaceous birds. Phylogenetics, Phylogenetically, they branched off from the core Galliforme ...
. Systematically, it is only distantly related to other guinea fowl
genera
Genus (; : genera ) is a taxonomic rank above species and below family as used in the biological classification of living and fossil organisms as well as viruses. In binomial nomenclature, the genus name forms the first part of the binomial s ...
. Its closest living relative, the
white breasted guinea fowl, ''Agelastes meleagrides'' inhabit primary forests in Central Africa. It is a member of the
bird
Birds are a group of warm-blooded vertebrates constituting the class (biology), class Aves (), characterised by feathers, toothless beaked jaws, the Oviparity, laying of Eggshell, hard-shelled eggs, a high Metabolism, metabolic rate, a fou ...
family
Numididae
Guinea fowl () (or guineahen) are birds of the family Numididae in the order Galliformes. They are endemic to Africa and rank among the oldest of the gallinaceous birds. Phylogenetically, they branched off from the core Galliformes after the Cra ...
, and is the only member of the genus ''Acryllium''. It is a resident breeder in northeast
Africa
Africa is the world's second-largest and second-most populous continent after Asia. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 20% of Earth's land area and 6% of its total surfac ...
, from southern
Ethiopia
Ethiopia, officially the Federal Democratic Republic of Ethiopia, is a landlocked country located in the Horn of Africa region of East Africa. It shares borders with Eritrea to the north, Djibouti to the northeast, Somalia to the east, Ken ...
and
Somalia
Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, th ...
through
Kenya
Kenya, officially the Republic of Kenya, is a country located in East Africa. With an estimated population of more than 52.4 million as of mid-2024, Kenya is the 27th-most-populous country in the world and the 7th most populous in Africa. ...
and just into northern
Tanzania
Tanzania, officially the United Republic of Tanzania, is a country in East Africa within the African Great Lakes region. It is bordered by Uganda to the northwest; Kenya to the northeast; the Indian Ocean to the east; Mozambique and Malawi to t ...
.
Description
The vulturine guinea fowl is a large () bird with a round body and small head. It's average weight is between 1kg to 1.6kg and it has longer wings, neck, legs and tail than other guinea fowl. The adult has a bare blue face and black neck, and although all other guinea fowl have unfeathered heads, this species looks particularly like a
vulture
A vulture is a bird of prey that scavenges on carrion. There are 23 extant species of vulture (including condors). Old World vultures include 16 living species native to Europe, Africa, and Asia; New World vultures are restricted to Nort ...
because of the long bare neck and head.
The slim neck projects from a cape of long, glossy, blue and white hackles. The breast is cobalt blue, and the rest of the body plumage is black, finely spangled with white. The wings are short and rounded, and the tail is longer than others in the family
Numididae
Guinea fowl () (or guineahen) are birds of the family Numididae in the order Galliformes. They are endemic to Africa and rank among the oldest of the gallinaceous birds. Phylogenetically, they branched off from the core Galliformes after the Cra ...
.
The sexes are similar, although the female is usually slightly smaller than the male and with smaller tarsal spurs. Young birds are mainly grey-brown, with a duller blue breast and short hackles.
Behaviour
The vulturine guinea fowl is a
gregarious
Sociality is the degree to which individuals in an animal population tend to associate in social groups (gregariousness) and form cooperative societies.
Sociality is a survival response to evolutionary pressures. For example, when a mother was ...
species, forming flocks outside the breeding season typically of about 25 birds. This species' food are seeds and small
invertebrate
Invertebrates are animals that neither develop nor retain a vertebral column (commonly known as a ''spine'' or ''backbone''), which evolved from the notochord. It is a paraphyletic grouping including all animals excluding the chordata, chordate s ...
s. This guinea fowl is terrestrial and will run rather than fly when alarmed. Despite the open habitat, it tends to keep to cover, and roosts in
trees
In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, e.g., including only woody plants with secondary growth, only p ...
. It makes loud ''chink-chink-chink-chink-chink'' calls.
It breeds in dry and open habitats with scattered bushes and trees, such as
savannah
A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach th ...
or grassland. It usually lays 4–8 cream-coloured eggs in a well-hidden grass-lined scrape.
Diet
These birds will feed on seeds, roots, tubers, grubs, rodents, small reptiles and insects. They will also occasionally feed on vegetation and fruits.
References
Further reading
* ''Pheasants, Partridges and Grouse'' by Madge and McGowan,
External links
Avicultural Data and ImagesBirdLife International Factsheet
{{Taxonbar, from=Q390270
vulturine guineafowl
Birds of the Horn of Africa
vulturine guineafowl