《太平广记·卷一百三十九·征应五》
当时越雟的南面献来了一只背明鸟。形状好象仙鹤，它不对着亮处呆着，朝北筑鸟窝。鸟的肉多而羽毛少，它的叫声变化多端。如果听到了钟磬笙竽等乐器的声音，它就会展开翅膀摇动着脑袋翩翩起舞。
时越雟之南献背明鸟，形如鹤状，止不向明，巢常对北，多肉少毛，其声百变，闻钟磬笙竽之声则奋翅摇头。
At that time, an envoy from south of Yuejiao brought a back sunbird as a gift. The bird looked like a crane, but it never turned toward the light. It faced north when it built its nest. The bird had plenty of meat and few feathers, and its cries were varied. If it heard the sounds of musical instruments such as bells, chimes, sheng, or pipes, it would spread its wings and dance while shaking its head.