Papilio nireus, the green-banded swallowtail, narrow-banded blue swallowtail, or African blue-banded swallowtail, is a butterfly of the family Papilionidae. It is found in Sub-Saharan Africa.
Description The wingspan is in males and in females. Forewing above at most with two blue submarginal spots in cellules 7 and 8; rarely in the female with several yellow ones; the blue (male) or greenish (female) median band is 2–7 mm broad at the hindmargin of the forewing and 4–12 mm in the middle of the hindwing, and is only a little widened posteriorly; the spot in cellule 2 of the hindwing does not completely cover the base of the cellule and the narrow spot in cellule lc does not reach the cell; forewing beneath almost always entirely without submarginal spots. [Nominate] Median band of the forewing above well developed, the spots of cellules 2—4 obliquely cut off distally; the discal spot in cellule 2 of the hindwing is very long and produced farther towards the anal angle than the spot in cellule 1 c. Sierra Leone to Angola and Uganda. — lyaeus Dbl. The median band narrower, but complete; the spot in cellule 2 of the hindwing is shorter and does not reach so far towards the anal angle as the one in 1 c. Larva above green, beneath whitish, with a whitish oblique longitudinal streak at each side on segments 7 and 8 and a girdle of ring-shaped spots on the third segment. Cape Colony to Angola and British East Africa. male ab. aelyus Suff. only differs from lyaeus in the discal spot in cellule 1 a of the forewing being entirely wanting and the one in cellule 1 b divided into two; German East Africa.— pseudonireus Fldr. (= donaldsoni Em. Sharpe). The median band is altogether absent on the forewing or is only represented by a few very small spots; on the hindwing it is formed as in lyaeus. Somali¬ land and Abyssinia. Aurivillius, [P.O.]C. 1908-1924. In: Seitz, A. Die Großschmetterlinge der Erde Band 13: Abt. 2, Die exotischen Großschmetterlinge, Die afrikanischen Tagfalter, 1925, 613 Seiten, 80 Tafeln (The Macrolepidoptera of the World 13).Alfred Kernen Verlag, Stuttgart.
Biology It flies year-round, with peaks from November to February.
The larvae feed on Calodendrum capense, Vepris species, and Citrus species.
Subspecies Listed alphabetically: P. n. lyaeus Doubleday, 1845 – Doubleday, E. 1845. Descriptions of new or imperfectly described diurnal lepidoptera.Annals and Magazine of Natural History (1) 16: 176-182. Full text narrowly green-banded swallowtail (Sudan, Uganda, Kenya, Tanzania, Malawi, Zambia, Mozambique, Zimbabwe, Botswana, Namibia, South Africa, Swaziland) P. n. nireus Linnaeus, 1758 – (Senegal, Gambia, Guinea-Bissau, Guinea, Burkina FasoTom Jamonneau, Abubakar S Ringim, Michel Libert, Andrea C Reyes Camargo, Alain Coache, Jérémy Bouyer, Annotated checklist of the butterflies (Lepidoptera: Papilionoidea) of Burkina Faso, West Africa—synthesis and new occurrences, Journal of Insect Science, Volume 26, Issue 3, May 2026, ieag018, https://doi.org/10.1093/jisesa/ieag018, Sierra Leone, Liberia, Ivory Coast, Ghana, Togo, Benin, southern Nigeria, Cameroon, Equatorial Guinea, Gabon, Congo, Angola, Central African Republic, Democratic Republic of the Congo, Uganda, western Tanzania, Zambia) P. n. pseudonireus C. & R. Felder, 1865 Felder, C. and Felder, R. [1865-1867] Reise der Osterreichischen Fregatte Novara Full text – (northern Kenya, northern Uganda, southern Sudan, Somalia, Ethiopia, Eritrea)
Taxonomy Papilio nireus belongs to a clade called the nireus species group with 15 members. The pattern is black with green bands and spots and the butterflies, although called swallowtails, lack tails with the exception of Papilio charopus and Papilio hornimani. The clade members are: Papilio aristophontes Oberthür, 1897 Papilio nireus Linnaeus, 1758 Papilio charopus Westwood, 1843 Papilio chitondensis de Sousa & Fernandes, 1966 Papilio chrapkowskii Suffert, 1904 Papilio chrapkowskoides Storace, 1952 Papilio desmondi van Someren, 1939 Papilio hornimani Distant, 1879 Papilio interjectana Vane-Wright, 1995 Papilio manlius Fabricius, 1798 Papilio microps Storace, 1951 Papilio sosia Rothschild & Jordan, 1903 Papilio thuraui Karsch, 1900 Papilio ufipa Carcasson, 1961 Papilio wilsoni Rothschild, 1926
References
Carcasson, R.H. (1960) "The Swallowtail Butterflies of East Africa (Lepidoptera, Papilionidae)". Journal of the East Africa Natural History Society pdf Key to East Africa members of the species group, diagnostic and other notes and figures. (Permission to host granted by The East Africa Natural History Society) Hancock, David Lawrence. (1984) The Princeps nireus group of swallowtails (Lepidoptera: Papilionidae): systematics, phylogeny and biogeography. Arnoldia Zimbabwe 9(12):181-215.
External links
Linnean collections Photographs of the holotype