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14 of the greatest animal migrations

By: Bryan Nelson on Sept. 27, 2010, 9 a.m.
A monarch butterfly rests on a flower

Photo: Paul Stein/Flickr

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Monarch butterflies

The annual monarch butterfly migration might be the most colorful migration in the natural world.

Outdistanced only by dragonflies among insects, the monarch migration spans 7,000 kilometers (about about 4,349 miles) includes three to four generations, and occasionally crosses the Atlantic Ocean. It is a spectacular thing to witness.

Populations of the monarchs can be found in Australia and New Zealand, where they are referred to as wanderer butterflies.