帝王蝶 (Danaus plexippus) 是一种广泛分布在世界上的蝴蝶，但最常见于北美洲和南美洲。帝王蝶的翼展为 8.9 厘米至 10.2 厘米，重约 0.5 克。它的翅膀为橙红色，带有突出的黑色脉络，且衬有厚厚的黑色边缘和白色斑点。它的腿和触角是黑色的，身体则是黑色的，带有白色的斑点。帝王蝶的毛毛虫有丰满的身体，上面覆盖着黄色、黑色和白色的条纹。
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Danaus plexippus
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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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