帝王斑蝶 (Danaus plexippus) 是一種廣泛分布在世界上的蝴蝶，但最常見於北美洲和南美洲。帝王斑蝶的翼展為 8.9 公分至 10.2 公分，重約 0.5 克。牠的翅膀為橙紅色，帶有突出的黑色脈絡，且襯有厚厚的黑色邊緣和白色斑點。牠的腿和觸角是黑色的，身體則是黑色的，帶有白色的斑點。帝王斑蝶的毛毛蟲有豐滿的身體，上面覆蓋著黃色、黑色和白色的條紋。
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Danaus plexippus
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false
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monarch
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Animal Facts
Some populations of monarch butterflies are migratory and will migrate over 4800km from Canada and the Northern USA to Mexico. It may take 4 generations of butterflies to complete this round trip.
During the migration of the monarch butterfly, thousands of butterflies will cluster together to create the ideal temperature for themselves.
When male monarch butterflies attempt to court and mate with females, 30% of the time they will accidentally grab a male and attempt to mate with him.
Monarch butterfly caterpillars feed on poisonous milkweed which makes them toxic to predators. The orange/red colour of the adults is thought to signal danger for this reason.
During the caterpillar stage, a monarch caterpillar will eat 200 times its bodyweight in milkweed.
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