They show up from virtually nowhere. No pre-announcement of their arrival is needed. When the team of Bangladeshi troops-cum-veterinaries serving with the United Nations Mission in South Sudan appear, any wise livestock owning individual better line up to have his or her animals treated.

Wau boda boda rider Dulu Remejo is upbeat about his new acquisition – a shiny white helmet and an orange reflective vest.

Participants at a cattle migration conference in Duk Padiet in Greater Jonglei have decided to maintain peaceful relations with their neighbours despite some attacks having taken place in the area.