Season
- Season 10 1970-01-01
- Season 11 1970-01-01
- Season 12 1970-01-01
- Season 13 1970-01-01
- Season 14 1970-01-01
- Season 15 1970-01-01
- Season 16 1970-01-01
- Season 17 1970-01-01
- Season 18 1970-01-01
- Season 19 1970-01-01
- Season 20 1970-01-01
- Season 21 2009-08-08
- Season 22 1970-01-01
- Season 23 2011-10-06
- Season 24 2012-10-04
- Season 25 2013-10-03
- Season 26 2014-10-23
- Season 27 2015-10-01
- Season 28 2016-10-09
- Season 29 1970-01-01
- Season 30 1970-01-01
- Season 31 1970-01-01
- Season 32 1970-01-01
- Season 33 1970-01-01
Season 33 Episode
- Season 21 Crossing the Urban-Rural Divide
- Season 21 Bluebird Lady, Bull Run, Streaked Horn Lark
- Season 21 Boat Building, Sixgill Sharks, Tsunami Update
- Season 21 Knowles Creek Update, Vultures, Wave Power
- Season 21 Forest Thinning, Oregon Cave Cleaning, Portland Stairways
- Season 21 Bending the Wallowa River, Golf Clinic, Invasive Species Rapid
- Season 21 Bryan Bates, Surfer, Devil's Staircase, Hagg Lake Expansion
- Season 21 Murres & Eagles, Geocaching, Wind and Bats
- Season 21 Ethanol, Forest Surveyors, Old Tree
- Season 21 Ocean Acidification, Pygmy Owls, Green Roofs
- Season 21 Brown Pelicans, Freeriding, Oak Savannah
- Season 21 Dead Zone Update, Whychus Creek, Coast Aquarium, Sea Turtles
Oregon Field Guide - Season 21 Episode 4 Knowles Creek Update, Vultures, Wave Power
10.00 48 minutes Knowles Creek used to be a floundering ecosystem, but Charley Dewberry and his team have successfully brought the stream back to life. In their attempts to restore the watershed basin surrounding Knowles Creek, Charley's team's efforts have caused the number of juvenile coho to triple since their restoration began in 1992. Once a controversial project, the scientists who defied conventional wisdom demonstrate how well the project has worked. Turkey Vultures are among the smartest birds in the worlds. Join Oregon’s foremost raptor expert, Jim Anderson, as he takes us on a comical journey from caves to canyons to a roadkill graveyard, all in search of a bird most people dismiss as “just plain ugly”. No, they’re not pretty, and yes, they eat food only after its long dead and stinky, but think about it… what would our world be like it all that dead stuff were left lying around? Update on Oregon State University project to use ocean waves off the Oregon coast to generate power.
