1. Who are they ? ??????????????

2. Guess it !

3. Guess it !

4. Illusory Light

6. Purple Crow butterfly

7. There are two species of winter migrating butterflies in the world.

8. The Mexican Monarch Butterflies

9. Monarch Caterpillar Becoming a Chrysalis Monarch Emerging from a Chrysalis

10. They are not able to survive the cold winters of the United States and Canada,so they migrate south and west each autumn to escape the cold weather.

11. http://monarchwatch.org/blog/ Canada United States Mexico Wow ! They are really incredible, right ?

12. The Taiwanese Purple Crow Butterflies

13. How many butterflies are there in Taiwan?

14. More than (1)60,000 (2)6,000 (3)600,000

15. Where can we find them ?

16. ↗

17. The warmer sheltered valleys near Maolin and Taitung.

18. Purple Butterfly Valley ↗ Can you see those butterflies ?

19. They together in large aggregations of one hundred to six hundred thousand butterflies. overwinter

20. Let’s get closer to it ! http://www.youtube.com/watch?v=ilVxq39rkIE Let’s see it !

21. They can fly up to 300 km to go back home. ★ ★ ● ● ● ● ● ● ● ★ ★ ★ ★

22. They travel in numbers of more than per minute. 10,000

23. Every winter,about one million butterflies glide on purple wings to take shelter in warm valleys at the foot of Dawu Mountain or Maolin. ● ● ● ● ● ● ● ● ★ ★ ★ ★ ★ ★ ★

24. Mt. in Taitung Dawu

25. do butterflies love to be there ? Why

26. First,they love rainless and sunny days

27. They don’t like ……..

28. the cold east northerly wind

29. The Purple Butterfly Valley faces the south and the sheltering mountains are in the north. the north the south

30. The Purple Butterfly Valley provides stable sources of water

31. It also provides nectar plants

32. The Purple Crow Butterfly Life Cycle

33. First an, egg

34. then a, larva

35. Caterpillar molting http://www.youtube.com/watch?v=NsMPxvsdDdk Let’s see the molting of another kind of butterfly

36. then a chrysalis,

37. What next?

38. The males possess “hair pencils”

39. Three threats to butterflies ….

40. Two introduced plants are damaging to the ecosystem. Mikania micrantha (American rope ) Chromolaena odorata (bitter bush) They form dense stands killing trees as well as growth of other plants.

41. There are several damages caused by humans.

42. To accommodate large population of tourists, people cut down their favorite trees to build …..

43. A parking lot and a park It was an overwintering site in which over 20,0000 butterflies winter.

44. Some people capture them in butterfly nets for recreation or for study

45. Let’s create a pure land for them.

46. Thank you for watching ! reference resources http://library.taiwanschoolnet.org/gsh2009/gsh5739/web_10.htm http://www.butterfly.org.tw/euploea/msg.html http://www.maolin-nsa.gov.tw/user/Article.aspx?Lang=2&SNo=03000027 http://butterfly.plog.mlc.edu.tw/category/196/345 http://etoe.mlc.edu.tw/materialf/6105/left.htm http://cc428jane.myweb.hinet.net/index.html http://butterflywebsite.com/conservation.cfm http://www.butterfly.org.tw/act1.php http://www.monarchwatch.org/gallery/photo/wat1.htm http://images.google.com.tw/images?q=%E7%B4%AB%E6%96%91%E8%9D%B6&h l=zhTW&gbv=2&tbs=isch:1&ei=cbRwTNS5CJOEuwP9yuVB&sa=N&start=20&ndsp= 20&biw=1020&bih=549http://images.google.com.tw/images?q=%E7%B4%AB%E6%96%91%E8%9D%B6&h l=zhTW&gbv=2&tbs=isch:1&ei=cbRwTNS5CJOEuwP9yuVB&sa=N&start=20&ndsp= 20&biw=1020&bih=549 http://tw.image.search.yahoo.com/search/images?ei=UTF- 8&p=%E7%B4%AB%E6%96%91%E8%9D%B6&fr2=tab-web&fr=autohttp://tw.image.search.yahoo.com/search/images?ei=UTF- 8&p=%E7%B4%AB%E6%96%91%E8%9D%B6&fr2=tab-web&fr=auto