24 Stagione
244 Episodiu
Oregon Field Guide - Season 28 Episode 5
Who's watching out for the 600 sensitive species of Oregon wildlife? Find out why many biologists say Oregon is falling behind when it comes to protecting species across Oregon. Inspired by our recent visits to the Valhalla slot canyon, we wondered just how these unusual features form. And see how the Columbia River system's once-abundant smelt runs are officially threatened.
- Annu: 2021
- Paese: United States of America
- Genre: Documentary
- Studio: PBS
- Parolla chjave:
- Direttore: Steve Amen
- Cast: Steve Amen
"
"
"
"
"
"
"
"
"
"
"
"
"
