This spectacular courtship display is called the lek, an old north word meaning dance.

这种特殊的求偶表演叫做 lek，一个古老的北欧词，意为舞蹈。

Courtship display, or mating rituals are a set of behaviours that animals perform as part of courtship.

求偶展示或交配仪式是动物在求偶过程中表现的一系列行为。

Birds of paradise have a courtship display which involves performing dances and acrobatics to attract a partner.

天堂鸟有一种求偶表演，包括表演舞蹈和杂技以吸引伴侣。

On the other, he flashes a shimmering courtship display at the female and covertly passes her parcels of sperm.

另一面，它向雌性闪烁着求爱的光芒，偷偷地把他的精子递给她。

Courtship displays include high  circling flight by the male and dramatic dives and chases by both falcons.

求偶表演包括雄性猎鹰的高空盘旋飞行和两只猎鹰的戏剧性俯冲和追逐。

The function of these tail veins is unclear, but it is hypothesized that they acted as in flight rudders or stabilizers, and might have been used in courtship displays.

这些尾静脉的功能尚不清楚，但据推测它们在飞行中充当方向舵或稳定器，并且可能用于求偶展示。