An owl is a nocturnal bird, while a sparrow is diunal.

猫头鹰是夜间活动的，而麻雀白天活动。

The animals and their nocturnal chirps are beloved in their native Puerto Rico.

考齐蛙和它们的夜鸣在波多黎各本地常受欢迎。

But the battle rages over nocturnal and Sunday work.

但夜间及星期天工作的争论仍然不休。

Yeah, there are several different varieties. They're very rare though, and they're nocturnal.

对，有很多种不同的几。不过几常稀有，而且它们是夜行动物。

Most bats are nocturnal foraging for insects like mosquitos, beetles, and moths.

大多数蝙蝠都在夜间活动，寻找像蚊子、甲虫和飞蛾样的昆虫。

The reason most people haven't heard about them is they're nocturnal.

大多数人没有听说过种动物的原因是穿山甲是夜行动物。

What was this nocturnal expedition, and why should I go armed?

在夜间出征是怎么回事？为什么我带武器去？

Mice are normally nocturnal and, of course, covered by fur.

小鼠一般在夜间活动，当然，其自身皮肤由皮毛所覆盖。

Owls are generally nocturnal, and most animals that are nocturnal have a really good sense of hearing.

猫头鹰通常是夜间活动的，大多数夜间活动的动物都有很好的听觉。

To capture the lives of animals, and their nocturnal journeys, in color.

捕捉动物们的夜间生活和行动。

Many of these nocturnal animals are also endangered or under threat.

许多夜行动物也濒临灭绝或受到威胁。

Now scientists understand that moths are important nocturnal pollinators.

如今科学家已能确定飞蛾种群是十分重的夜间传粉者。

Humans are generally not nocturnal by nature.

人类通常不是天生的夜行性动物。

These tiny critters, co-existed with the giant, meat-eating dinosaurs and probably survived by being nocturnal.

些小生物与体型巨大的食肉恐龙共同生活在侏罗纪时代，据推测些小生物可能是通过在夜间活动逃过一劫的。

By contrast, crickets are nocturnal and have more varied diets.

相比之下，蟋蟀是夜行性动物，而且饮食更加多样。

But in school, we learn raccoons are nocturnal. They sleep during the day.

老师说，浣熊只在夜间行动。白天都在睡觉。

Bats are nocturnal creatures, which means they sleep all day and stay up all night.

蝙蝠是夜行动物，也就是说它们白天睡觉，晚上行动。

Suggesting that the nocturnal notion was more than just a shot in the dark.

表明夜行概念不仅仅是在黑暗中活动。

Leading are nocturnal safari, Hong Kong British educator and photographer Lawrence Hylton.

领导夜间探险的是来自香港的英国教育家和摄影师Lawrence Hylton。

But that's because they're nocturnal, solitary and live in underground burrows.

但那是因为它们在夜间活动、独居并且住在地下洞穴里。