Hai Collection, Middle Volume. Radical: Bird (niǎo). Character: si. Kangxi strokes: 23. Page 1500, Entry 01. According to Collected Rhymes (Jiyun), pronounced si. According to Orthography of Rhymes (Zhengyun), pronounced si. Egret (lusi). Commentary on Explaining Birds (Shining Bird) in the Erh Ya (Erya): The white egret is known as lusi in common parlance; the feathers on its head resemble silk threads. Classic of Birds (Qinjing): When the egret is at rest, its feathers lie flat. Sea Records (Hailu) states: It is also called silk-wearer; later generations added the bird radical. Also according to Collected Rhymes (Jiyun), pronounced zi. The meaning is the same.