The genus Poicephalus belongs to the subfamily Psittacinae of the ( Psittacidae) and comprises ten species of native to various regions of the Afrotropical realm, which encompasses Sub-Saharan Africa, ranging from Senegal in the west, Ethiopia in the east, and to South Africa in the south. Taxonomy of Poicephalus parrots Like lovebirds ( Lovebird) and vasa parrots ( Vasa parrot), the latter being endemic to Madagascar, the Poicephalus parrots are typical specimens of Afrotropical zoogeography. Several of the species exist in slightly different forms, or subspecies.
Poicephalus parrots have been kept as pets and companion birds for centuries, the Senegal parrot perhaps being the most famous species. The trade in this species most likely began in the early 19th century, when Senegal parrots first appeared as companion birds in Europe. Alongside Grey parrot, Senegal parrots still range among the mostly frequently imported parrots from Africa.
According to H. Strunden, Poicephalus, from Ancient Greek, means "grey head" ( poliós = grey and kephalé = head).
Most species in the Poicephalus genus are predominantly green. However, grey is also common, and the feathers on their heads frequently vary in colour from the rest of the plumage. Senegal parrots and brown-headed parrots for example have blackish or dark brown heads, while the head plumage of brown-necked and Cape parrots is grey-brown to silver-grey. With the exception of the red-fronted parrot, the different colours of head and body plumage of these four species do not overlap or blend. The red-fronted parrot only shows a more fluent transition, with merely the slate grey ear patches and the red front and crown clearly set apart. Another variation is found in male Rüppell's parrots, whose brown plumage is overlaid with silver-grey at the ear patches and the top of their heads, with only a tinge of green on the top-side plumage. Female Rüppell's parrots, on the other hand, have a bright blue back section, rump, and upper tail coverts, while the feathers on their lower ventral region and vent are a dull blue.
Several of the species show marked sexual dimorphism, Rüppell's parrots, brown-necked parrots, cape parrots, and red-bellied parrots are dimorphic, the other species of Poicephalus parrots cannot be distinguished by the colours of their plumage. The difference is especially clear in red-bellied parrots, where males have red or bright orange plumage on breast, belly and below their wings while the feathers of females are all grey-brown in these areas.
The smallest species in the genus is the Meyer's parrot, with adults reaching a body-length of only 22 centimeters (≈ 8,66 in.) and weighing approximately 120 g (≈ 4,23 oz). The largest species, the Cape parrot, by contrast, is usually almost as large as an African grey parrot, adult males reaching a size of 32 centimeters (≈ 12,6 in.) and a weight of about 400 g (≈ 14,1 oz).
Many Poicephalus parrots have bulky heads and powerful beaks, the colour of which varying with the species. While brown-headed parrots and have a grey upper mandible and an off-white lower one, other species have a homogeneously grey-coloured beak or a horn-coloured one with a darker tip.
The Cape parrot stands out with a particularly sturdy beak in relation to its overall size which it needs to obtain its main food source, the hard-shelled fruit of Podocarpus trees. British parrot specialist Rosemary Low has pointed out that, among the genus, only the Cape parrot is able to crack open with its beak. Except for , this is a rare ability among parrots in general.
Poicephalus parrots have spread to only a few islands on the African shore; while brown-headed parrots can be found on Pemba Island in the Indian Ocean, and Senegal parrots occur on the Îles de Los off the Guinean coast, Poicephalus parrots have become extirpated from Zanzibar.
Normally, the distribution areas of the different Poicephalus species do not overlap but this may happen when food becomes scarce after longer periods of drought and the parrots are forced to migrate to find more abundant food sources. Then several different Poicephalus species can be found in one region. Other parrot species naturally occurring in the same distribution area as Poicephalus parrots include Grey parrot, African ring-necked parakeets, and different species of like red-headed, black-collared, yellow-collared, rosy-faced, black-cheeked, black-winged, Fischer's, and Lilian's lovebirds.
Grey-headed parrots ( P. f. suahelicus) and Meyer's parrots have settled in an especially wide range of different habitats. The natural distribution of the grey-headed parrot ranges from wooded lowland savannahs to humid high-altitude rainforests, up to altitudes of 4000 m. Meyer's parrots also occur in the moist forest regions of various life zones, as well as in shrub and grassland savannahs.
Occasionally, Poicephalus parrots can be observed in agricultural areas, where they feed on fruit and grain.
Living mostly in small family groups consisting of adult birds and their young, Poicephalus parrots sometimes form loose larger groups with other families. If there is plenty of food available, those groups may comprise up to 100 birds.
Even though some groups of Poicephalus parrots sometimes cause losses in orchards, maize or millet fields near settlement areas, they are generally shy and keep away from humans.
Poicephalus parrots spend the nights in treetops, returning to the same roosting tree regularly. At dusk, they start preening before then leaving for their feeding grounds; loud calls usually announce the birds' departure. Depending on the food supplies available, Poicephalus parrots are able to cover large distances: brown-necked parrots have been known to fly ca. 80 km (≈ 50 miles) in search of food. Subpopulations of red-fronted parrots have been observed roosting in higher altitude areas before descending to their sources of food, overcoming a difference in altitude of about 300 m. After feeding in the morning, Poicephalus parrots often rest in treetops in the vicinity of the respective food source, alternately sleeping or dozing and preening. They return to their feeding grounds once more in the late afternoon before leaving for their nocturnal roosts.
The Cape parrot is a notable exception among the Poicephalus parrots since it is an Oligophagy dietary specialist feeding mostly on the seeds of Podocarpus and Celtis trees. Apart from trapping and habitat loss, It is probably for this reasons that the Cape parrot is an endangered species, listed as "vulnerable" by the IUCN.
Some Poicephalus species like Senegal and Meyer's parrots are partial migrants, thus compensating for scarce or seasonally fluctuating food supplies. They only migrate out of breeding season.
A clutch of eggs usually consists of two to four eggs, laid within one to four days and incubated solely by the female through 26 to 28 days. Meanwhile, the male feeds the female and stays close to the nesting site until some days after the chicks have hatched. As soon as the female no longer has to warm the chicks permanently, the male also begins to feed them. The hatchlings' weight could only be measured in captive breeding so far and is five (Meyer's parrot) to six (brown-headed parrot) gram (≈ 0,18 to 0,21 oz). The chicks are covered in white or light grey downy feathers and their usually rather noisy parents become more quiet and watchful while around the nest.
How long the non-captive hatchlings stay in the nest is poorly known, more precise observations of wild specimens are only available for Cape parrots and brown-necked parrots. Young Cape parrots remain in the nesting cavity for up to 79 days, while the brown-necked parrot chicks leave their home on the 69th day.
The most common ectoparasites found on Poicephalus parrots are and Bird louse that live on the birds' feathers and skin. Like other wild animals, Poicephalus parrots may be infested with internal parasites like Coccidia, Ascaridida, Capillaria nematodes, and Cestoda (tapeworms).
Little is known about diseases typical of wild Poicephalus parrots but the examination of Cape parrots and Rüppell's parrots found that parts of these populations are infected with the virus that causes the Psittacine beak and feather disease (PBFD). There is still no treatment available for this often fatal disease and although some birds may show no symptoms, they may nonetheless spread the virus they carry.
Whereas red-bellied parrots and are apparently still rather frequent, some subspecies of otherwise stable species of Poicephalus parrots have become endangered due to habitat loss and trapping. This holds true for the Poicephalus gulielmi fantiensis subspecies of the red-fronted parrot, for example, which has come under threat because of extensive deforestation and trapping (although The Convention on the International Trade in Endangered Species (CITES) makes trade in such birds illegal).
There are as yet no reliable data concerning the Niam-Niam parrot native to the Chad and Central African Republic and the yellow-fronted parrot endemic to the Ethiopian Highlands. Because of intense deforestation in its habitat, the population of the yellow-fronted parrot is probably declining. Information regarding brown-headed parrots and Rueppell's parrots are contradictory. While some studies suggest that both species have become very rare all over their respective range, other studies claim that both species are declining in numbers but are not critically endangered yet.
Of those species where reliable data is available, the most critically endangered Poicephalus species is the Cape parrot which largely depends on Podocarpus seeds for his diet. With many areas of Podocarpus trees in decline due to forest clearance this species is threatened with extinction. In 2018, only 1.453 specimens of wild Cape parrots were counted, which might indicate a slight increase compared to 2004,
The genus contains ten species.
Senegal parrot ( P. senegalus) | Grey head, green back and chest. Yellow, orange or red belly depending on subspecies. | Poicephalus senegalus versteri
Poicephalus senegalus mesotypus | West Africa | |
Meyer's parrot ( P. meyeri) | Green, yellow under wings. Six subspecies (including nominate) with variable yellow colouration. | Poicephalus meyeri saturatus
Poicephalus meyeri matschiei Poicephalus meyeri transvaalensis Poicephalus meyeri reichenowi Poicephalus meyeri damarensis | Sub-Saharan Africa | |
Red-bellied parrot ( P. rufiventris) | Mostly green and grey. Male has red belly. | none | Horn of Africa | |
Brown-headed parrot ( P. cryptoxanthus) | Mostly green and grey. Yellow under wings. | Poicephalus crypoxanthus tanganyikae | East Africa | |
Red-fronted parrot ( P. gulielmi) | Mostly green, variable amount of red on head and shoulders depending on subspecies. | Poicephalus gulielmi fantiensis
Poicephalus gulielmi massaicus | African tropical rainforest | |
Cape parrot ( P. robustus) | Mostly green, grey or brownish head and neck. | none | South Africa | |
Brown-necked parrot ( P. fuscicollis) | Mostly green, grey or brownish head and neck. | Poicephalus fuscicollis suahelicus | Sub-Saharn Africa | |
Rüppell's parrot ( P. rueppellii) | Overall dark brown colour, head is dark greyish, yellow on legs and leading edge of wings, female has blue rump and lower back. | none | Southern Africa | |
Yellow-fronted parrot ( P. flavifrons) | Mostly green with a yellow head. | Poicephalus flavifrons aurantiiceps | Ethiopia | |
Niam-Niam parrot ( P. crassus) | Mostly green with a brown head. | none | Central African Republic and adjacent areas |
While some Poicephalus populations have come under pressure from habitat loss, others are affected by trapping for the pet trade. For example, while it is still listed as "least concern" on the IUCN Red List, the Senegal parrot is one of the species most frequently caught from the wild, with 735,775 birds recorded in international trade since 1981.
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