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Biology

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Generally a solitary species (2), the African baza can usually be observed flitting from tree to tree searching for prey, which is either swooped down upon or, in the case of insects and chameleons, plucked from the branches. Its diet mainly consists of large insects, such as beetles, grasshoppers and termites, and reptiles, such as snakes and lizards, but it has also been known to take small mammals, birds, fish and even crabs (4). The African baza's breeding season coincides with the rainy season in the tropics and varies according to location, with southern African populations breeding from September to March, West African populations from June to August and Kenyan populations from November to June. During courtship, small groups of males form, and engage in soaring flights, turning in the air in order to display their plain or barred wing linings. Once breeding pairs are established, the male and female may also soar and circle around one another. The pair build an untidy nest in the fork of a tree, composed of leafy twigs, with a small, leaf-lined cup in the centre into which two to three eggs are laid. These are incubated for around 32 to 33 days, with the chicks brooded for a further 30 to 42 days before fledging (4).
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Conservation

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Although there are no specific conservation measures in place for this species at present (1), it is one of the many species found within the Gamba Protected Areas Complex in Gabon (5). This collection of eight protected areas, two of which have National Park status, is helping to preserve Gabon's unique wildlife from logging and hunting (5).
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Description

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In contrast to the powerful, muscular appearance of most birds of prey, the African baza, is a relatively small, plump-bodied raptor. The head, neck and upper chest are mainly grey, with a small, blackish crest at the back of the head and a thin chestnut patch on the nape of the neck. The remaining upperparts are mainly blackish-brown, with short, black tail feathers, marked with three grey bands and ending with grey-white tips. The most striking features of this species are its brightly coloured eyes, yellow in the female and orange-red in the male, as well as its white underparts, which are distinctively patterned with a series of dusky bars. There are three subspecies of African baza, which inhabit different locations and habitats, and can be distinguished by the colouration and markings of the plumage. Aviceda cuculoides batesi has the darkest upperparts and heavily barred underparts, Aviceda cuculoides cuculoides has solid chestnut wing linings, while Aviceda cuculoides verreauxi has distinctive white barred wing linings. The juvenile is mainly brown above, with a white streak running above the eye, and white below, with an irregular patterning of dark blotches on the flanks and breast (4).
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Habitat

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Predominantly a forest and woodland dwelling species, the African baza may be found in trees surrounding rivers, humid savannah woodland, eucalyptus and pine plantations and even suburban gardens (4).
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Range

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The African baza's extensive range encompasses much of sub-Saharan Africa, from Senegal in the west to Cameroon, extending east across to Kenya, and south as far as Angola on the west coast and south-east South Africa on the east coast (1) (4).
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Status

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Classified as Least Concern (LC) on the IUCN Red List (1) and listed on Appendix II of CITES (3).
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Threats

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While the African baza is never found in great abundance at any particular location, its range is so large that, even with low population densities, its population is estimated to number between 10,000 and 100,000 individuals (1) (4). Although deforestation is reducing the area of its preferred forest habitat, it appears to adapt readily to secondary forest and plantations, and can even survive in suburban gardens, hence it does not appear to be particularly at risk at present (4).
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African cuckoo-hawk

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The African cuckoo-hawk, or African baza, (Aviceda cuculoides) is a medium-sized raptor in the family Accipitridae so named because it resembles the common cuckoo. It is found in sub-Saharan Africa and along the eastern parts of Southern Africa, preferring dense woodland and forest of either indigenous or exotic trees.

Description

The male is blackish-brown above with a grey mantle and chest with a blackish crest, the underparts are white marked with broad chestnut bars. The tail is black with three grey bars and grey and white tip. The females are browner with paler chestnut bars on the underparts. Distinctive in flight as a small raptor with a small head with broad, narrowly rounded wings and a medium length tail. Wingspan is just over double the body length, females are slightly larger than males.[3]

In flight

Distribution and subspecies

The African cuckoo-hawk is found across much of sub-Saharan Africa,[4] and the following subspecies are recognised:[5]

Habitat

The African cuckoo-hawk is a shy species which occurs in the interior and edges of evergreen forest and deciduous woodlands, including suburban gardens and more open savannas, up to 3,000 m (9,800 ft). When migrating through east Africa it also occurs in drier woodland and bush.[1]

Biology

The African cuckoo-hawk is largely sedentary but during April–November some migrate northwards to East Africa, in particular to coastal Kenya, and outside the breeding season some migrate to southern Africa, especially to the Transvaal Highveld. The breeding season varies by geography; in southern Africa breeding happens during September to March; in west Africa the season is June to August; while in Kenya there are two breeding periods per year, the first in March to June and the second from November to February, timed to follow the two rainy seasons. The African cuckoo-hawk's general behaviour is little known, as this species occurs at low densities and has secretive habits, although they are slightly more conspicuous during migration and so may appear more numerous.[1]

The African cuckoo-hawk mainly eats reptiles and insects. It hunts within the canopy by flying from tree to tree, searching from a perch before flying to pluck the prey item from the canopy or ground. The following food items have been recorded in its diet: flap-necked chameleon Chamaeleo dilepsis, southern dwarf chameleon Brachypodion ventrale, lizards, snakes, frogs, fish, fruit bats, mice, birds, grasshoppers and locusts, stick insects, silverfish larvae, caterpillars, mantids and freshwater crabs.[4]

The African cuckoo-hawk is a monogamous, solitary nester, belying its secretive reputation by performing spectacular aerial displays as the breeding season approaches. The nest is constructed by both sexes in 11 days and consists of an untidy platform of twigs, vines and leaves which is lined with leaves, grass and small sticks. It is normally placed in the highest branches of a tree, usually between 10 and 30 metres (33 and 98 ft) above the ground. Normally only one or two eggs are laid, occasionally three. The chicks are fed and brooded by both parents, before they leave the nest after 28 days and take their first flight a few days after that. The juveniles remain dependent on their parents for about a week after their first flight. Wahlberg's eagle Hieraaetus wahlbergi has been recorded preying on the chicks of the African cuckoo-hawk.[4]

References

  1. ^ a b c BirdLife International (2016). "Aviceda cuculoides". IUCN Red List of Threatened Species. 2016: e.T22694944A93480370. doi:10.2305/IUCN.UK.2016-3.RLTS.T22694944A93480370.en. Retrieved 13 November 2021.
  2. ^ Gill F, D Donsker & P Rasmussen (Eds). 2020. IOC World Bird List (v10.2). doi : 10.14344/IOC.ML.10.2.
  3. ^ Ferguson-Lees, James; Christie, David A. (2001). Raptors of the World. Christopher Helm. pp. 321–323. ISBN 0-7136-8026-1.
  4. ^ a b c "Aviceda cuculoides (African cuckoo hawk, Cuckoo hawk)". Biodiversity Explorer. Iziki: Museums of South Africa. Retrieved 23 October 2016.
  5. ^ "African Cuckoo-Hawk Aviceda cuculoides Swainson, 1837". Avibase. Denis Lepage. Retrieved 23 October 2016.

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African cuckoo-hawk: Brief Summary

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The African cuckoo-hawk, or African baza, (Aviceda cuculoides) is a medium-sized raptor in the family Accipitridae so named because it resembles the common cuckoo. It is found in sub-Saharan Africa and along the eastern parts of Southern Africa, preferring dense woodland and forest of either indigenous or exotic trees.

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