who are they ?
DESCRIPTION
Who are they ?. ? ? ? ? ? ? ?. G u e ss i t !. G u e ss i t !. Illu so ry Li ght. G u e ss i t !. Purple Crow butterfly. There are two species of winter migrating b u t t e r f l i e s in the world. The Mexican M o n a r c h B u t t e r f l i e s. - PowerPoint PPT PresentationTRANSCRIPT
Who are they ?
???????
Guess it !
Guess it !
Illusory Light
Guess it !
Purple Crow butterfly
There are two species of winter migrating butterflies in the world.
The Mexican Monarch Butterflies
Monarch Caterpillar Becoming a Chrysalis
Monarch Emerging from a Chrysalis
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.
http://monarchwatch.org/blog/
Canada
United States
Mexico
Wow ! They are really incredible , right ?
The Taiwanese Purple Crow Butterflies
How many
butterfliesare there in Taiwan?
More than (1)60,000
(2)6,000(3)600,000
Where can we
find them ?
↗
The warmer sheltered valleys near Maolin and Taitung.
Purple Butterfly Valley
↗Can you see those butterflies ?
They together in large aggregations of
one hundred to six hundred thousand butterflies.
overwinter
Let’s get closer to it !
http://www.youtube.com/watch?v=ilVxq39rkIE
Let’s see it !
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
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
do butterflies
love to be there ?
Why
First ,they love rainless and sunny
days
They don’t like ……..
the cold east northerly wind
The Purple Butterfly Valleyfaces the south and the sheltering mountains are in the north . the north
the south
The Purple Butterfly Valley provides stable sources of water
It also provides nectar plants
The Purple Crow Butterfly
Life Cycle
First an ,egg
then a ,larva
Caterpillar molting
http://www.youtube.com/watch?v=NsMPxvsdDdkLet’s see the molting of
another kind of butterfly
then a chrysalis,
What next?
The males possess “hair pencils”
Three threatsto butterflies ….
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 .
There are several damages caused by
humans.
To accommodate large
population of tourists,
people cut down their favorite trees to build …..
A parking lot and a park
It was an overwintering site in which over 20,0000 butterflies winter .
Some people capture them in butterfly nets for recreation or for
study
Let’s
create
a pure land
for them .
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