The People's Insect
Sidedoor
00:00
Monarch Caterpillars
A monarch caterpillar can grow 2,000 times in its original mass. An average monarch is about four inches in wingspan and weighs 0.5 grams. In late August, when the years last generation of monarch emerge from their chrysalises, something remarkable happens. Each butterfly has this little voice deep inside whispering: Go to Mexico, Mexico.
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