Who are they ?
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Transcript of Who are they ?
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Who are they ?
???????
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Guess it !
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Guess it !
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Illusory Light
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Guess it !
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Purple Crow butterfly
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There are two species of winter migrating butterflies in the world.
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The Mexican Monarch Butterflies
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Monarch Caterpillar Becoming a Chrysalis
Monarch Emerging from a Chrysalis
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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.
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http://monarchwatch.org/blog/
Canada
United States
Mexico
Wow ! They are really incredible , right ?
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The Taiwanese Purple Crow Butterflies
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How many
butterfliesare there in Taiwan?
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More than (1)60,000
(2)6,000(3)600,000
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Where can we
find them ?
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↗
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The warmer sheltered valleys near Maolin and Taitung.
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Purple Butterfly Valley
↗Can you see those butterflies ?
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They together in large aggregations of
one hundred to six hundred thousand butterflies.
overwinter
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Let’s get closer to it !
http://www.youtube.com/watch?v=ilVxq39rkIE
Let’s see it !
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They can fly up to 300 km togo back home.
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They travel in numbers of more than per minute.10,000
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Every winter ,about one million butterflies glide on purple wings to take shelter in warm valleys at the foot of Dawu Mountain or Maolin.
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Mt. in TaitungDawu
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do butterflies
love to be there ?
Why
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First ,they love rainless and sunny
days
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They don’t like ……..
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the cold east northerly wind
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The Purple Butterfly Valleyfaces the south and the sheltering mountains are in the north . the north
the south
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The Purple Butterfly Valley provides stable sources of water
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It also provides nectar plants
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The Purple Crow Butterfly
Life Cycle
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First an ,egg
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then a ,larva
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Caterpillar molting
http://www.youtube.com/watch?v=NsMPxvsdDdkLet’s see the molting of
another kind of butterfly
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then a chrysalis,
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What next?
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The males possess “hair pencils”
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Three threatsto butterflies ….
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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 .
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There are several damages caused by
humans.
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To accommodate large
population of tourists,
people cut down their favorite trees to build …..
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A parking lot and a park
It was an overwintering site in which over 20,0000 butterflies winter .
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Some people capture them in butterfly nets for recreation or for
study
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Let’s
create
a pure land
for them .
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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=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=auto