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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 20 20th-Anniversary Special
- Season 20 Saltmakers, Undersea Eruptions, Underwater Fossils
- Season 20 Bagby Hot Springs, Bighorn Pneumonia, Rhododendron Garden, Spirit Lake Photo Essay
- Season 20 Fishers, Reptile Hunter, Terns & Cormorants
- Season 20 Amphibian Disease, Immersive Media, Oregon Garden Update, Vole Holes
- Season 20 Mt Washington Climb, Slugs, Umpqua Fish Watcher
- Season 20 Beeswax Ship, Electric Drag Racing, Native Bumblebees
- Season 20 Celilo Revealed, Effigy Beach
- Season 20 Hut to Hut Biking, Pine Bark Beetles, Stream Temperature
- Season 20 Catlin Gabel Forest Restoration, Condor Nest Search, Deschutes River Recreation
- Season 20 Feral Pigs, Fish Cam, Siletz Photoessay, Wetland Farming
- Season 20 Hummingbird Flight, Malheur Refuge Carp, Return to Mount St. Helens
- Season 20 Cats & Birds, Kayak Fishing, Multibeam Sonar, Spotted Owl Update
- Season 20 Eagle Cap Extreme, Portland Biking, Summer Lake Revisit
- Season 20 Jim Newman Salute
Oregon Field Guide - Season 20 Episode 4 Fishers, Reptile Hunter, Terns & Cormorants
10.00 48 minutes The fisher, a member of the weasel family, once thrived in the Pacific Northwest. But now it’s rare to see one. We take a look at what is happening to the population. There may be fewer than 50 fishers in the cascade range. Fishers are elusive, scientist have set up 16 monitoring stations to try to film the secretive mammal. They also try to capture fisher hair by using sticky tape. Hair samples are then sent to labs for DNA analysis. We follow 'reptile hunters' Chris Rombough and Sarah Petrakis into the wilds of the Willamette Valley and the Columbia Gorge to see just how many snakes and other reptiles we can find. Their finds include a garter snake, gopher snake, racer, ringneck snake, western rattlesnake, and an alligator lizard. You may be surprised to see what's hiding right along the trail. A grand experiment ten years ago attempted to save endangered salmon from feasting Caspian terns. We return to East Sand Island near the mouth of the Columbia River and find it seems to have worked. Except now there’s a new danger from an even larger group of double-crested cormorants who have moved in.
