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Oregon Field Guide

Songbird Survey

OPB | Feb. 1, 1997 7:30 p.m.

The number of migratory songbirds is declining. Join us as we hunt for some reasons why.

Oregon Field Guide

Building the MAX-Line Tunnel

OPB | Feb. 1, 1997 7:30 p.m.

The geologic past is revealed when light rail tunnels are dug in Portland's West Hills.

Oregon Field Guide

Willamette Valley Natural History

OPB | Feb. 1, 1997 7:30 p.m.

A look back at the valley and what its vegetation was like when the first settlers came.

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Discovering Valhalla: Oregon's Hidden Gorge (2709)

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Major Support Provided By: Dorothy D. Gage

Additional Support Provided By: the Coit Family Foundation, Fred and Clara Dolen Charitable Foundation, Kay Kitagawa and Andy Johnson-Laird, Christine and David Vernier, and the Greenfield/Hartline Habitat Conservation Fund of the Nature Conservancy.

Special thanks for support by: The Roundhouse Foundation, Jon and Nancy Decherd, Bonnie and Peter Reagan