|Acraea encedon encedon|
Acraea encedon, the common acraea, white-barred acraea or encedon acraea, is a butterfly of the family Nymphalidae. It is found in tropical Africa and south-western Arabia. It is one of the species of Acraea sometimes separated in Telchinia.
The wingspan is 40–50 millimetres (1.6–2.0 in), with the female being slightly larger than the male, but otherwise similar in pattern and colour. The apex of the forewing is blackish and divided by a white bar. The rest of the surface of the wings are usually orange with black spots, however paler varieties with a greyish or yellowish base colour are also found.
There are two subspecies:
- Acraea encedon encedon is found in Africa south of the Sahara and in Madagascar. In South Africa this species is absent from the dry western parts of the country, but common in KwaZulu-Natal coastal areas on the eastern side of the country.
- Acraea encedon rathjensi Le Doux, 1933 is found in south-western Arabia.
The eggs are oval in shape. The larvae feed on Commelina species, such as C. diffusa. The flight period of the adults is all year, but they are most common from March to May. They are slow fliers, and perch on low-growing vegetation.
In some populations there are two kinds of females, one producing offspring in a normal 1:1 sex ratio, the other producing females only. In other populations the sex ratio is apparently normal. Scientists first believed the distorted sex-ratio was caused by a driving W chromosome. Later research suggests it is caused by cytoplasmic bacteria.
Acraea encedon from Eritrea; mounted specimen
|Wikimedia Commons has media related to Acraea encedon.|
|Wikispecies has information related to Acraea encedon|
- "Acraea Fabricius, 1807" at Markku Savela's Lepidoptera and Some Other Life Forms
- Afrotropical Butterflies: Nymphalidae - Tribe Acraeini
- Die Gross-Schmetterlinge der Erde 13: Die Afrikanischen Tagfalter. Plate XIII 56 e as encedon, sganzini and lycia g as daira
- Images representing Acraea encedon at Bold
- Images representing Acraea encedon encedon at Bold
- All-female broods and mimetic polymorphism in Acraea encedon (L.) (Lepidoptera: Acraeidae) in Tanzania
- Sex ratio distortion in Acraea encedon (Lepidoptera: Nymphalidae) is caused by a male-killing bacterium
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