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 2 Bluebird Lady, Bull Run, Streaked Horn Lark
10.00 48 minutes Elsie Elzroth is one very dedicated woman. She has spent most of her life helping restore Western bluebird populations to the Corvallis area. The ancient forest that surrounds Portland's Bull Run water supply is off limits to logging after decades of controversy. But questions loom large over fire, climate change, and the risk of leaving a water supply untreated in one of the most pristine watersheds in the nation. Streaked Horned Lark ground-nesting species probably should be extinct by now except that, surprisingly, it has survived in the Portland area because of industrial development.
