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- 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 23 Arctic White Geese, Paragliding Race, Treeverse
- Season 23 Elk at Mount St. Helens, Lighthouse Photoessay, Snowkiting
- Season 23 Bighorn Release, Photogeology, Willamette Valley Fen
- Season 23 Bald Eagle Recovery, Cyclocross, Jim Anderson
- Season 23 Nature Sound Recording, Silver Falls State Park, Zumwalt Cooperation
- Season 23 Avalanche Safety, Fishing Quotas, Music in Nature
- Season 23 Columbia Gorge: The Fight for Paradise
- Season 23 Open Water Swimming, Pine Butterflies, Radon
- Season 23 Chetco River Revisited, Gold Fish, Muddy Boots
- Season 23 Beacon Rock Climbing, Ditch Fish, Newberry Crater Geothermal
- Season 23 Balloon Archaeology, Biscuit Fire 10 Years Later, Collier Glacier
- Season 23 Kite Festival, Trees and Pollution, Ultralight Hiking
- Season 23 Bug Chicks, Canoe Journey, Cape Arago photoessay, Pacific Crest Trail
- Season 23 Mount Hood Climbing Oregon's Highest Peak
Oregon Field Guide - Season 23 Episode 8 Open Water Swimming, Pine Butterflies, Radon
10.00 48 minutes Open Water Swimming
When you think about competitive swimming you probably picture what you see at the Olympics. Long pools. One swimmer per lane. But many people prefer something different: swimming across open lakes. Late in the summer of 2011, Eel Lake near Coos Bay, Oregon featured some serious racing - and a goofy obstacle course.
Pine Butterflies
An exceedingly rare population explosion of pine butterflies fills the Malheur National Forest with a virtual snowstorm in August. The mysterious outbreak may occur for 2 or 3 years and then disappear for 3 decades. The beauty extracts a price: the butterflies, while caterpillars, ate needles off 250,000 acres of trees.
Radon
Public health authorities tell us that radon is the second leading cause of lung cancer in the US, and the highest among non-smokers. But scientists have only been aware of radon as a health hazard since the early 1980s. So, just how big a health risk is radon? We take a look at the geologic conditions that account for radon’s presence in Oregon as well as the current health science, testing and mitigation thinking on the subject.
