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