Papilio demodocus (Citrus swallowtail)

Charmaine discovered them on our citrus trees this afternoon! They destryed our on tree completely and were verrrry busy with the next three! I truly hope the pesticide she used on them will work fast!!

This is the common, large black and pale yellow butterfly seen regularly in gardens in South Africa and also occurring in natural vegetation. It occurs in open, often disturbed, habitats throughout Africa south of the Sahara, as well as on the Cape Verde Islands, Madagascar and Mauritius. It can be a pest of citrus saplings in nurseries and, although found on mature citrus trees, does not cause sufficient damage to warrant instituting control measures. On young plants, if larvae and pupae do reach high levels, the best control procedure is evidently to simply pick them off by hand.

The Citrus swallowtail passes through about three generations during spring, summer and autumn, and the winter period is usually spent hibernating as a pupa. One can, however, see the occasional adult during winter.
(Thanks to Biodiversity Explorer)

Check this one, on Wildcard.co.za, Charmaine saw that tongue today as well!! Eisch!!