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Episode 1706

Last broadcast Thursday July 26, 2007

Burrowing Shrimp

There may be as many as a billion burrowing shrimp in the over 900 acres of tide flats at Yaquina Bay. But scientists studying the creature and the role it plays in tempering pollution believe that more than 50 percent of its population may be infected with a lethal parasite. The parasite, which may have arrived relatively recently in the holds of cargo ships from China, reduces the shrimp's capacity for reproduction. The question scientists are trying to answer is exactly how big a role this creature plays in tempering pollution and at what point they are overloaded with organic matter. The answers are vital for sustaining the health of the waterway's fish, worm and crab populations.

Train Mountain

In Chiloquin, Field Guide takes a ride on a spectacular mini-railroad with some garden train enthusiasts. Quenten Breen began construction on the railroad 18 years ago to provide a place where grown men could come to ride small trains. Today, there are over 24 miles of track and folks come from near and far to ride the rails of what the Guiness Book of World Records says is the longest hobby railroad in the world. We'll look at some of the meticulous reproductions, one-eighth the size of normal trains, and see what future plans are for the development of this railroad fantasyland.

For more information:

Train Mountain

• Online: www.trainmountain.org

Taylor's Checkerspot Butterfly

A small park in Benton County is home to the largest population of one of the rarest butterflies in the world. Until recently, little was known about the Taylor's Checkerspot, but studies now confirm their numbers are declining. They need a specialized prairie meadow habitat to survive and that habitat is disappearing. See how the Oregon Zoo and some private landowners are trying to bring hope for the survival of this beautiful creature.

For more information:

Xerces Society for Invertebrate Conservation

• Located in Portland, the Xerces Society for Invertebrate Conservation takes a leading role in the effort to protect biodiversity worldwide.
• Online: www.xerces.org