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National Park ServiceTwo large trumpeter swans swim in profile. They are banded around the neck as part of the reintroduction of this species to the river.
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A green dragonfly emerges from its old skin, seen below.  

Did You Know?
Dragonflies spend most of their life living in the water. Eventually they climb out of the water and grab onto something. Here they will emerge from their old skin like a butterfly emerges from its cocoon and fly away.

Last Updated: July 25, 2006 at 00:22 EST