Alex Ritman “On Becoming a Guinea Fowl,” the second feature from Zambian-Welsh writer-director Rungano Nyoni, has been picked up by A24 for international sales ahead of its world premiere at Cannes Film Festival next month. The film, which marks Nyoni’s follow-up to her acclaimed 2017 feature debut “I Am Not a Witch,” was also financed by A24 alongside BBC Film and Fremantle, while it was developed by BBC Film and Element Pictures.