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课件网) Understanding ideas 新外研必修Book 1 Unit 5 Into the wild Pre-reading What does the video mainly talk about It talks about monarch butterflies' amazing migration to Mexico. Watch and think: Background knowledge about monarch butterfly The monarch butterfly, which lives in America, is probably one of the most well-known butterflies on earth. It has a famous name "Monarch Butterfly". It is widely said that the dazzling orange wings of this butterfly reminded European colonists who first arrived in North America of the Prince of Orange (later King William III of England), hence the name "Monarch Butterfly". 生活在美洲地区的黑脉金斑蝶大概是地球上最广为人知的蝴蝶之一，它有一个响当当的名字 “帝王蝶”（monarch butterfly）。一个流传甚广的说法是，这种蝴蝶耀眼的橘黄色翅膀令初到北美大陆的欧洲殖民者想到了建立丰功伟业的奥兰治王子（Prince of Orange，也即后来的英格兰国王威廉三世），“帝王蝶” 因此得名。 Do you know the names of these animals monarch butterfly Siberian crane red panda Atlantic salmon killer whale African lion Look and choose the animals that migrate. monarch butterfly Siberian crane red panda Atlantic salmon killer whale African lion √ √ √ √ Background knowledge about animal migration Animal migration is the relatively long-distance movement of individual animals, usually on a seasonal basis. It is the most common form of migration in ecology. It is found in all major animal groups, including birds, mammals, fish, reptiles, amphibians, insects, and crustaceans. The trigger for the migration may be local climate, local availability of food, the season of the year or for mating reasons. To be counted as a true migration, and not just a local dispersal or irruption, the movement of the animals should be an annual or seasonal occurrence, such as birds migrating south for the winter; wildebeest migrating annually for seasonal grazing; 动物迁徙是个体动物相对长距离的移动，通常是季节性的。这是生态学中最常见的迁移形式。它存在于所有主要的动物类群中，包括鸟类、哺乳动物、鱼类、爬行动物、两栖动物、昆虫和甲壳动物。引发迁徙的原因可能是当地的气候、当地的食物供应、一年中的季节或交配的原因。怎样才算作一次真正的迁徙，而不仅仅是局部的扩散或入侵？动物的迁徙应该是一年一度或季节性的，比如鸟类迁徙到南方过冬；为季节性食草每年迁徙的角马等； While-reading What is the main idea of the passage A. The monarch’s migration. B. The reasons for monarch’s migration. C. Mexico’s monarch. The main idea of a passage can be found from its title, the topic sentence, or even the pictures. Read the passage and find out what mystery the scientists have solved. The scientists have solved the mystery of how monarch butterflies manage to travel a long distance and find their way to their destination. Choose where you are most likely to find the passage. 1 In a scientific research paper about the monarch butterfly's migration. 2 In a popular nature magazine introducing the monarch butterfly. 3 In a travel leaflet encoura ... ...
