《新理念》初一英语第3册 Animal Travellers

Animal Travellers迁徙动物

Chapter1Long-distance travelers

Animals are amazing travelers. Some animals live1place and travel to another place during the year.This is called migration.

There are many reasons why animals migrate--for food,warmth or a safe place to breed.

There are many ways in which animals migrate--some fly,some swim and some walk.

Chapter2Monarch butterflies

Monarch butterflies are one of the most amazing animal travellers.They make to huge journeys each year--one in autumn and one in spring.

Scientists think monarch butterflies migrate to find milkweed.The butterflies need milkweed to breed.

Scientists also think that monarch butterflies migrate to get away from the cold weather.

In Canada and the northern parts of America,thousands of monarch butterflies migrate in autumn.This is their first journey.第一章长途旅行者

动物是了不起的旅行者。有些动物在一年中住在一个地方，然后去另一

个地方旅行。这叫做迁移。

动物迁徙有很多原因——为了食物、温暖或者一个安全的地方繁殖。

动物迁徙的方式有很多种，有的飞，有的游，有的走。

第二章黑脉金斑蝶

黑脉金斑蝶是最神奇的动物旅行

者之一。他们每年都要进行长途旅行——一次在秋天，一次在春天。

科学家认为黑脉金斑蝶迁徙是为

了寻找马利筋。蝴蝶需要马利筋来繁殖。

科学家们还认为黑脉金斑蝶迁徙

是为了躲避寒冷的天气。

在加拿大和美国北部，成千上万的黑脉金斑蝶在秋天迁徙。这是他们的

第一次旅行。

Some monarch butterflies fly to California,where they stay for the winter.About300million monarch butterflies spend the winter in Mexico.

On the journey south,monarch butterflies eat nectar from flowers which gives them strength for their long journey.

Monarch butterflies face many dangerous when they migrate.Many butterflies are eaten by birds,some butterflies are killed by cars when flying across highways,and others are killed in storms.

Also,monarch butterflies can't fly in the straight line because they have to fly around mountains and fight against strong winds.

Thousands of people help to track the migration of monarch butterflies. Monarch butterfly watchers have found out some amazing facts about these butterflies.

Monarch butterflies may travel over 3200kilometers on their journey.The travel about50kilometers a day,at speeds of about12kilometers per hour.

The monarch butterflies’second journey is in spring.The butterflies fly north.

一些黑脉金斑蝶飞到加利福尼亚，在那里过冬。大约有3亿只黑脉金斑蝶在墨西哥过冬。

在南下的旅途中，黑脉金斑蝶以花蜜为食，这给了它们长途旅行的力量。

黑脉金斑蝶在迁徙时面临许多危险。许多蝴蝶被鸟类吃掉，一些蝴蝶在高速公路上飞行时被汽车杀死，还有一些在暴风雨中死亡。

此外，黑脉金斑蝶不能在直线上飞行，因为它们要绕山飞行，还要对抗强风。

成千上万的人帮助跟踪黑脉金斑

蝶的迁徙。黑脉金斑蝶的观察者们已经发现了关于这些蝴蝶的一些惊人的事实。

黑脉金斑蝶的行程可能超过3200公里。每天行驶约50公里，速度约为每小时12公里。

黑脉金斑蝶的第二次旅行是在春天。蝴蝶飞向北方。

On the way back north,the butterflies lay their eggs on milkweed, and then they die.So,the butterflies that set out on this journey don't finish it.

The butterflies’eggs hatch into caterpillars and feed on milkweed.Soon, they turn into butterflies and set out to travel north.

But,this generation of monarch butterflies may not make it either. Sometimes it can take three or four generations of butterflies to make it back to Canada and North America.

Chapter3Northern fur seals

Northern fur seals spend winter in the warm waters near California.There is lots of food for the seals,but there are also lots of predators.

When spring comes the northern fur seals set out on a long journey to islands near Alaska.These islands are a safe place for the seals to breed,as they are not as many potatoes.

The male seals arrive at the islands first.They fight for the best places to breed and wait for the females to arrive.

The females arrive about four weeks later.They each give birth to one seal pup.

在返回北方的路上，蝴蝶在马利筋上产卵，然后死去。因此，踏上这段旅程的蝴蝶并没有完成它。

蝴蝶的卵孵化成毛毛虫，以马利筋为食。很快，他们变成了蝴蝶，开始向北旅行。

但是，这一代黑脉金斑蝶可能也不会成功。有时需要三到四代蝴蝶才能回到加拿大和北美。

第三章北方海豹

北部的海豹在加利福尼亚附近的温暖水域过冬。海豹有很多食物，但也有很多捕食者。

当春天来临的时候，北方的海豹就开始了前往阿拉斯加附近岛屿的长途旅行。这些岛屿是海豹繁殖的安全之地，因为它们没有那么多的土豆。

雄性海豹先到达岛屿。它们争夺繁殖的最佳地点，等待雌性的到来。

雌性大约四个星期后到达。它们各生了一只小海豹。