Ants keep predatory insects away from where their aphids feed; Gmail keeps the spammers out of our inboxes.

蚂蚁赶走蚜虫进食之处的捕食性昆虫；谷歌邮箱也帮助收件前远离那些垃圾邮件制造者。

Like in New Zealand, for example, tons of iconic animals like the Kiwi are threatened by introduced predators, including stoats, which are, like, this cute furry little weasel.

比如，纽西兰，许多代表性的动物，比如鹬鸵，受到引入的捕食性动物威胁，包括短尾鼬，它就像毛绒绒的可爱小鼬鼠。

For decades, aquariums have tried to contain the world's largest predatory fish.

几十年来，各家水族馆试图容纳世界上最大的捕食性鱼类。

So how did some whales go from chomping predators to filter feeders?

那一些鲸鱼是如何从咀嚼性捕食动物变成滤食动物的呢？

Tom Gable is tracking a predator. In fact, he's tracking a whole pack of them.

汤姆·盖博追踪一个捕食性动物。事实上，他追踪一大群动物。

They also found predators on the herbivores, in the form of ciliates (a type of protozoan) and predator bacteria, which feed on other bacteria.

他还发现了以这些食草动物为食的捕食者，存形式是纤毛虫（一种原生动物）和以他细菌为食的捕食性细菌。

This reef has suffered in the last few years six cyclones, two major coral-bleaching events, and various attacks by the predator crown-of-thorns starfish.

过去几年，珊瑚礁遭遇了六次气旋，两次重大的珊瑚白化，还有捕食性动物棘冠星鱼的几次攻击。

Polar bears are pure predators, so they kill other animals to eat. That's how they survive.

北极熊是地道的捕食性动物，它以他动物为生，这是它的生存方式。

Ecologists have long assumed the predators can influence their ecosystems in two main ways.

生态学家一直认为，捕食性动物可以通过两种主要方式来影响生态系统。

The first was whether they might be able to learn new predators, specifically people, based on their association with dead crows.

第一，它是否能根据人和死亡乌鸦之间的关联辨识出新的捕食性动物，特别是人。

So do you kill the introduced predators to save the endangered species?

所以，要掉引入的捕食性动物来拯救濒临绝种的物种吗？

Yet predatory animals, to include sharks, are not very big risk takers.

然而，包括鲨鱼内的捕食性动物，并非冒险家。

Some experts say that blackbirds may have been trying to escape a predatory bird.

一些专家认为，黑鸟可能正试图逃离一只捕食性的鸟类。

You have information about the sex predator?

你有关于性捕食者的信息吗?

Using makeup to paint the backs of both male and female spiders, the researchers made each sex look like the opposite to determine whether that would change the behavior of a much larger jumping spider, the predatorial Phidippus californicus.

研究人员使用化妆品雄性和雌性蜘蛛的背部涂上颜色，让每种性别看起来都相反， 以确定这是否会改变一种更大的跳蛛— —捕食性 Phidippus californicus 的行为。

More and more of these sex predators are going online, and they're becoming more sophisticated in the ways that they go after young people, minors that they're trying to exploit.

越来越多的性捕食者正转向网络，他针对年轻人、未成年人进行剥削的手段上变得愈发老练。

And what scientists have discovered is that predator fish will often chase after this differently colored minnow because it is easy to see.

科学家发现，捕食性鱼类常常会追逐这种颜色与众不同的米诺鱼，因为它很容易被发现。

In 300 AD, Chinese farmers specially bred ferocious predatory ants in orange orchards to protect the trees from other bugs.

公元300年，中国农民柑橘园中特意培育凶猛的捕食性蚂蚁，以保护树木免受他害虫侵扰。

Predatory deer dogs frolicked along ancient rivers, while their relatives returned to the ocean to become the first otter-like whales.

捕食性的鹿犬古老的河流边嬉戏，而它的亲戚则返回海洋， 变成了最早的类似水獭的鲸类。

Predators have been observed to avoid attacking brightly coloured species.

【observe】据观察发现，捕食性动物会避免袭击色彩鲜艳的物种。