Lin Hsien-tang says that crested serpent eagle eggs are slightly smaller than hen's eggs, and the female birds incubate them for about a month. The eaglets begin to hatch out in May. They are similar in size to domesticated hen chicks, and are covered in white down.
林顯堂表示，大冠鷲卵比雞蛋小一些，母鳥孵蛋期約一個月，五月開始，幼鳥破殼而出，體型與小雞相去不遠，長滿白絨絨羽毛。