Two Sociable Lapwings Vanellus gregarius, satellite tagged in Kazakhstan last summer, have flown more than 5,000 miles to central Sudan, where they have spent the winter.

• 2只去年夏天在哈萨克斯坦由卫星追踪到的黄颊麦鸡，却飞跃了超过5000英里来到苏丹中部越冬。