Xiongniao estrus at the lively and active, both higher than in another ring, while Ciniao estrus at the wings droop jitter, and the issue of noise, and then call a chase Xiongniao.

• 雄鸟发情时活泼好动，鸣声比平时既高又多；而雌鸟发情时翅膀下垂抖动，并发出响声，然后鸣叫着追逐雄鸟。