Both species bite mainly during the daytime, particularly in the early hours after dawn and for 2-3 hours before darkness.

这两种蚊子主要在白天叮咬，特别在拂晓之后的清晨和天黑之前2至3小时。

youdao

Then sorrow and crying shall flee away forever, as darkness before the dawn. --Selected.

忧愁要在你面前逃跑，好像黑暗在早晨前逃跑一般。

youdao

To keep poachers from slipping in under cover of darkness, patrols continue long after sunset and begin again before dawn.

为了防止偷猎分子趁着夜色的掩护偷偷溜进保护区，巡逻队在日落之后还要继续巡视很久，而且第二天还要赶在拂晓前进行巡逻。

youdao

In the darkness before dawn, they drive the 60-kilometer (37-mile) road from Sesriem and line up at the entrance gate, then gingerly navigate the rough road about 5 more kilometers to the first dunes.

CNN: Romancing the dune in Namibia