Tuesday 21 May
African giant swallowtail (Papilio antimachus)
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African giant swallowtail fact file
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African giant swallowtail description
The beautiful African giant swallowtail has the distinction of being the largest butterfly in Africa (3). Its long, narrow wings are orange and brown, with black markings. Like other members of the Papilionidae family, the African giant swallowtail has well-developed legs, and the area at the front of the head between the eyes is hairy. This family is also recognised by very short palpi, short projections below the head between which the tongue is coiled (3). Female African giant swallowtails are considerably smaller than males, with less elongated forewings (2).
- Wingspan: 20 – 23 cm (2)
African giant swallowtail biology
The life cycle of the African giant swallowtail begins with the laying of a single, smooth, nearly spherical egg. From this egg hatches a larva, which, like most larvae of Papilio species, probably feed on plants of the Rutaceae family (3). The larvae possess an extensible, fleshy forked organ called the osmeterium in the first thoracic segment. The osmeterium is connected to a scent gland, and when the larva is threatened or disturbed, it thrusts out the osmeterium through a slit in the thorax, filling the surrounding air with a repulsive odour (2) (3). After going through five changes of skin, (instars), the chrysalis, or pupa, develops. The pupa is attached to a plant, and held in an upright position by a thread of silk around the middle (3).
Female African giant swallowtails are generally more retiring in their habits, while males may congregate at drinking spots or be observed flying swiftly alongside streams. Males of Papilio species can be highly aggressive, and sometimes jostle and fight while defending a territory along a stretch of river (4).Top
African giant swallowtail range
Occurs in central and western Africa, in the Democratic Republic of the Congo, Congo Republic, Central African Republic, Gabon, Angola, Cameroon, Nigeria, Ghana, Ivory Coast, Liberia and Sierra Leone (2).Top
African giant swallowtail habitat
The African giant swallowtail inhabits primary tropical forest, up to 1,500 metres above sea level. Male African giant swallowtails are often encountered near streams or damp mud while the females often keep to the tree-tops and are rarely seen (2) (4)Top
African giant swallowtail status
Classified as Data Deficient (DD) on the IUCN Red List (1).Top
African giant swallowtail threats
Not enough is known about this giant butterfly species for the IUCN to assess its risk of extinction (1), but it is known that its forest habitat is being rapidly destroyed. This could swiftly deteriorate the status of a butterfly that is already scarce (5).Top
African giant swallowtail conservation
The African giant swallowtail has been recorded from several protected areas (5), including the Bwindi Impenetrable National Park, Uganda (6). In 1991, the IUCN/SSC Lepidoptera Group published an action plan for the conservation of swallowtail butterflies, which recommended that all rainforest reserves within the distribution of the African giant swallowtail should be surveyed to see if this species is present. For those reserves that do hold populations of this unique butterfly, the adequacy of habitat protection should be assessed. More information on the African giant swallowtail’s vulnerability to forest loss and degradation is also needed (5), to determine the status of this impressive species and inform any future conservation actions that may be necessary.Top
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- Development stages of an immature insect. At the end of each instar, the insect sheds the rigid external skeleton (the exoskeleton), enabling it to grow and form a new, larger exoskeleton.
- The IUCN Species Survival Commission: a network of volunteer experts working together towards achieving the vision of ‘A world that values and conserves present levels of biodiversity’.
- Stage in an animal’s lifecycle after it hatches from the egg. Larvae are typically very different in appearance to adults; they are able to feed and move around but usually are unable to reproduce.
- Primary tropical forest
- Tropical forest that has remained undisturbed for a long time and has reached a mature condition.
- Stage in an insect’s development when huge changes occur, which reorganise the larval form into the adult form. In butterflies the pupa is also called a chrysalis.
- Part of the body located near the head in animals. In insects, the three segments between the head and the abdomen, each of which has a pair of legs. In vertebrates, the thorax contains the heart and the lungs.
- IUCN Red List (September, 2007)
- D’Abrera, B. (1997) Butterflies of the Afrotropical Region. Hill House Publishers, Victoria, Australia.
- Carcasson, R.H. (1975) The Swallowtail Butterflies of East Africa (Lepidoptera, Papilionidae). EW Classey Ltd, Faringdon, England.
- Collins, N.M. and Morris, M.G. (1985) Threatened Swallowtail Butterflies of the World. IUCN, Gland, Switzerland and Cambridge, UK.
- New, T.R. and Collins, N.M. (1991) Swallowtail Butterflies: An Action Plan for their Conservation. IUCN, Gland, Switzerland.
- UNEP-WCMC: Bwindi Impenetrable National Park (March, 2008)
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