It's that time of the year again when hordes of white butterflies are crossing the country.
The white butterflies in South Africa (mainly Brown-veined Whites, Belenois aurota aurota - shown here in the photo) originate in the Kalahari and in other arid regions of the Northern Cape province. During some years, they have massive population explosions where the numbers get so big that they eat all the leaves off of the available food plants. If the adults stayed in that area, there would not be any food left for their larvae so they move off towards the east, and lay their eggs as they go along. They basically keep on flying until they die, but in many cases they actually reach the Indian Ocean and are often still seen flying into the sea.
- Megan Loftie-Eaton