Migration
TED Radio Hour
The Humble but Tenacious Monarch Butterfly
Comedian Maeve Higgins talks about the humble but tenacious monarch butterfly. Monarch butterflies travel thousands of miles across international borders every year. The same monarch never makes the journey twice because their migration is multi-generational. Sonia Altizer, an ecologist at the University of Georgia says monarchs are different from other migratory animals.
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