Monarch ButterHy* Migration
Every year 4 regular as lockwork
fnd,
appens.As the weather changes and food is harder to
my animala are pulled by a strong, patural Oinstinct t6 eave their homes for part ofthe
1ook for more food and a better plaGe to hive and breed( anm
し over 2 million rildebeest sefofr on a
Journey together to find better grazing aream2Another exammple is the Arctic tern. which
me ofthe longewt mierationsi Hang irom the Acic to the Atarctid apd back agaid everr Year
around trip of abouk 70.900km)
Ye smileooe De buirRiee alo Same kmg mameeoey oeme な te me
samazing is taken_by_the_monarch_butterH./Ove_300. pfragile creatures ny
4.828Mm soutH from North America to Mexicos mountainoue oyamel fhr forest to gst_away_from
the cold we
What is unusualabout the butterly ーー that only the fourth generation。rhich is borm
ICEB53h 2おSa
butterfHieg have strong wings (they can fly as far as 120km a day). long ife spans でthey iive as long
5 6-8 months) and are born to fhy Before the winter cold sets in,/4hey start migrating south.
waitornet oy How tie me niion outes sm eveo meatotp he seoe tm es tr
Gancestors did/and they hibernate there/fHow they do this is a mysteryzAProbabhy evemythng
writen in their DNA
When they 2 next spring。全ey mate and set offto fty back home。 buyで
overonly part
ofthe way north,人en breed and die. The next three generations. ie. the rs amd third.
fy further north and repeat the pattern untiL theyrfinally return to North America. ac of these
three generation butterfHhies lives onlylfor 2-6 weel
re are patches of mi
apd their young feed.
before they mate。 1ay eggs. and dieZStrangsly
gtheir way back home on which they lay eggs
monarch butterfly is in danger. nedgh many of the butterfiies_ sites
jn Mexie6 have been made into even here they are not safe/③As s resulzcold air
gets to the trees where the butterflies stay and because of this, many of them die-
本1meT
mt and The World Wildhife Fund for Nature (WWF) are working together to save the
orest and educate people.
(出典:H Nagata & G. Tiey AMysreries p Saiegce Nanan-do. 2015)
