Human Nature
![Fly fishing on the Umpqua River. Umpqua River, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514955898595-TSYGEVHI36KPAQ2PFRNG/David-Herasimtschuk-1.jpg)
Fly fishing on the Umpqua River.
Umpqua River, Oregon
![Winter camping in Colorado's high country. American Lakes Trail, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956056967-E8XID1GZ8BJWT6KI9MZ4/David-Herasimtschuk-31.jpg)
Winter camping in Colorado's high country.
American Lakes Trail, Colorado
![Snorkeling along a river chub nest in the Great Smoky Mountains National Park Great Smoky Mountains National Park, Tennessee www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516680442497-F90S6HWP51ZFMAFZP4K0/DSC06668.jpg)
Snorkeling along a river chub nest in the Great Smoky Mountains National Park
Great Smoky Mountains National Park, Tennessee
www.FreshwatersIllustrated.org
![Fly fishing on the Mckenzie River. Mckenzie River, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516681524117-VUYFWQULIFITKZBOZGMJ/20171204_OR_SahalieFallsFishing_dherasimtschuk+DSC09881.jpg)
Fly fishing on the Mckenzie River.
Mckenzie River, Oregon
![Dr. Omar Perez-Reyes snorkels the cascading waters of the Quebrada Sonadora in search of his study subjects, freshwater shrimp. Surveying river communities throughout Puerto Rico, Dr. Perez-Reyes's work has helped in revealing the importance of fres](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514955935639-S8B0C6WQB0UBKVX2IE6Q/David-Herasimtschuk-2.jpg)
Dr. Omar Perez-Reyes snorkels the cascading waters of the Quebrada Sonadora in search of his study subjects, freshwater shrimp. Surveying river communities throughout Puerto Rico, Dr. Perez-Reyes's work has helped in revealing the importance of freshwater shrimp within tropical rivers and their role in maintaining healthy watersheds and clean water.
This research adds to a growing body of science documenting the complexity and valuable ecosystem services of tropical river ecosystems.
El Yunque National Forest, Puerto Rico
www.FreshwatersIllustrated.org
![Appreciating the calm complexities of cold, a backpacker explores the harsh winter wilderness that is Rocky Mountain National Park's Chasm Lake. Chasm Lake, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956092315-G9QFS853QA09D20U432D/David-Herasimtschuk-33.jpg)
Appreciating the calm complexities of cold, a backpacker explores the harsh winter wilderness that is Rocky Mountain National Park's Chasm Lake.
Chasm Lake, Colorado
![After heavy flooding in the marshes hundreds of frogs were washed into a local residents swimming pool. A group of kids worked hard to get the frogs out of the pool Macquarie Marshes, Australia](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516832073007-LCMJMCFW0DJEAXY0Q7FK/IMG_2689.jpg)
After heavy flooding in the marshes hundreds of frogs were washed into a local residents swimming pool. A group of kids worked hard to get the frogs out of the pool
Macquarie Marshes, Australia
![A Willamette Valley farmer, Tony Stroda, grades what will become a grass waterway to minimize erosion and sedimentation from a grass and grain field. Rattlesnake Creek, Oregon www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516832220452-KY4FSQCGHMQO21O10FQL/20110812_OR_LongTomRestoration_dherasimtschuk_0207.jpg)
A Willamette Valley farmer, Tony Stroda, grades what will become a grass waterway to minimize erosion and sedimentation from a grass and grain field.
Rattlesnake Creek, Oregon
www.FreshwatersIllustrated.org
![Crushing Cocoa beans Kachabri, Costa Rica](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516832285697-MESUW83KEAUZZHNW6B0P/20130331_CR_Cachabri_DavidHerasimtschuk+_96A9712.jpg)
Crushing Cocoa beans
Kachabri, Costa Rica
![Snowshoeing through the deep snows of Oregon's Cascade Mountains Cascades, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516681309111-VDMEENDJ4APXYMJS5UCS/DSC08628.jpg)
Snowshoeing through the deep snows of Oregon's Cascade Mountains
Cascades, Oregon
![Climber repelling into a canyon Ouray, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516832347557-XQ6QL4LSEEO9HFDCMP2X/IMG_6021.jpg)
Climber repelling into a canyon
Ouray, Colorado
![Warm Springs tribal members brave the pounding waters of Oregon's Willamette Falls to harvest Pacific lamprey. The Willamette is one of the last places left in the Columbia Basin that tribes can still catch sustainable numbers of this disappearing f](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516832385995-HQ7E1NJ0Z8XFT51B6LFC/IMG_0466.jpg)
Warm Springs tribal members brave the pounding waters of Oregon's Willamette Falls to harvest Pacific lamprey. The Willamette is one of the last places left in the Columbia Basin that tribes can still catch sustainable numbers of this disappearing fish.
Willamete Falls, Oregon
www.FreshwatersIllustrated.org
![Fly fishing on the Mckenzie River. Mckenzie River, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956046025-M7ZD6VW8DT1TTQNYWLYK/David-Herasimtschuk-30.jpg)
Fly fishing on the Mckenzie River.
Mckenzie River, Oregon
![The annual salmon fest in Leavenworth Washington brings in school groups from all over Washington to learn about native fish species. The Pacific lamprey is the highlight for many of the kids. Leavenworth, Washington www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889102853-J5L61H64YDDU8VWO4DEJ/20111028_OR_Salmonfest_dherasimtschuk_0043.jpg)
The annual salmon fest in Leavenworth Washington brings in school groups from all over Washington to learn about native fish species. The Pacific lamprey is the highlight for many of the kids.
Leavenworth, Washington
www.FreshwatersIllustrated.org
![Snorkeling with a Japanese giant salamander. Japan www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516681620584-P319BHV004J1UO3J3T6K/IMG_4746.jpg)
Snorkeling with a Japanese giant salamander.
Japan
www.FreshwatersIllustrated.org
![Teaching the dog to swim Kamo River, Japan www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889179442-E9E0IIT5O07M8CD29WJH/IMG_3237.jpg)
Teaching the dog to swim
Kamo River, Japan
www.FreshwatersIllustrated.org
![Waterfall hiking Proxy Falls, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514955982567-WL8QFLOFWCGY1RI0LOTS/David-Herasimtschuk-13.jpg)
Waterfall hiking
Proxy Falls, Oregon
![Contractors help put large wood back into a small creek near Portland. Habitat structures such as these help provide valuable habitat for salmon and other native freshwater species. Johnson Creek, Oregon www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889240111-5W3HA2DVTRVNWNVVZ1DL/20110913_OR_JohnsonCreekRestoration_dherasimtschuk_0169.jpg)
Contractors help put large wood back into a small creek near Portland. Habitat structures such as these help provide valuable habitat for salmon and other native freshwater species.
Johnson Creek, Oregon
www.FreshwatersIllustrated.org
![Researchers from the University of Colorado collect recently metamorphosed amphibians to check them for malformations. Bay Area, California www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889304144-2G4B2CA2Z1W45IFQA5NO/IMG_0921.jpg)
Researchers from the University of Colorado collect recently metamorphosed amphibians to check them for malformations.
Bay Area, California
www.FreshwatersIllustrated.org
![Appreciating the calm complexities of cold, a backpacker explores the harsh winter wilderness that is Rocky Mountain National Park's Chasm Lake. Chasm Lake, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956095492-NZ2HSBF0BW47TAT7IH1U/David-Herasimtschuk-34.jpg)
Appreciating the calm complexities of cold, a backpacker explores the harsh winter wilderness that is Rocky Mountain National Park's Chasm Lake.
Chasm Lake, Colorado
![Researchers from the University of Colorado collect recently metamorphosed amphibians to check them for malformations. Bay Area, California www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889388166-98DXZBZ73KQ4XMTCHY7F/IMG_0526.jpg)
Researchers from the University of Colorado collect recently metamorphosed amphibians to check them for malformations.
Bay Area, California
www.FreshwatersIllustrated.org
![Tadpole catching Macquarie Marshes, Australia](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889538156-GVSDDWNLWQ1964JWC97L/IMG_6473.jpg)
Tadpole catching
Macquarie Marshes, Australia
![Backpacking in Oregon's old growth. Cummins Creek, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1516680643305-GLL1VSAULXYWRT7A8U6W/DSC00110.jpg)
Backpacking in Oregon's old growth.
Cummins Creek, Oregon
![Marsh bike ride Macquarie Marshes, Australia](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889814038-QERI8FCQSIX0CEG57EFU/IMG_7275.jpg)
Marsh bike ride
Macquarie Marshes, Australia
![Tracking marsh frogs Macquarie Marshes, Australia](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889898397-PPO4TJ5WV35TC14MQ1KU/IMG_9739.jpg)
Tracking marsh frogs
Macquarie Marshes, Australia
![Climbing turkey rock South Platte, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517890042016-J9JBLLSLH8ELZBZJ9ZYZ/IMG_7820.jpg)
Climbing turkey rock
South Platte, Colorado
![Descending into the underworld of Oregon's Owyhee Canyonlands, a hiker and her nimble hound navigate a labyrinth of steep walls and hoodoo spires in search of native redband trout. Middle Fork Owyhee River, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956046840-52MPGAF6PLR94USYK46W/David-Herasimtschuk-29.jpg)
Descending into the underworld of Oregon's Owyhee Canyonlands, a hiker and her nimble hound navigate a labyrinth of steep walls and hoodoo spires in search of native redband trout.
Middle Fork Owyhee River, Oregon
![Garry Hall, Chairman of the Macquarie Marshes Environmental Landholders Association, crosses a river while herding his cattle. Macquarie Marshes, Australia](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517889453611-X85T4EZ9KAAPSZENT9OO/IMG_4613.jpg)
Garry Hall, Chairman of the Macquarie Marshes Environmental Landholders Association, crosses a river while herding his cattle.
Macquarie Marshes, Australia
![Staff and volunteers with the Long Tom Watershed Council salvage fish and other aquatic life from a pool before installing a new fish friendly culvert to a previously impassable road crossing. Jordan Creek, Oregon www.FreshwatersIllustrated.org](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517890107504-Q4FATP4GIYFY5NNSWA1P/20110824_OR_LongTomCulvert_dherasimtschuk_0054.jpg)
Staff and volunteers with the Long Tom Watershed Council salvage fish and other aquatic life from a pool before installing a new fish friendly culvert to a previously impassable road crossing.
Jordan Creek, Oregon
www.FreshwatersIllustrated.org
![Winter camping in Colorado's Rocky Mountain National Park. Chasm Lake, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956113729-2946LJKEXDSSWKK8X344/David-Herasimtschuk-35.jpg)
Winter camping in Colorado's Rocky Mountain National Park.
Chasm Lake, Colorado
![On the way to boreal toad country. Williams Fork Arapahoe National Forest, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1517890208058-AN3RM7NEIXILUDBFEPSJ/IMG_4592.jpg)
On the way to boreal toad country.
Williams Fork Arapahoe National Forest, Colorado
![Winter camping in Colorado's high country. American Lakes Trail, Colorado](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514956060040-W6MSG3T7OEQ45JPNNEWW/David-Herasimtschuk-32.jpg)
Winter camping in Colorado's high country.
American Lakes Trail, Colorado
![Waterfall hiking Proxy falls, Oregon](https://images.squarespace-cdn.com/content/v1/5a271a80d7bdce2af0d48fc1/1514955857332-Z4BMI5JTTQJB0GVSOSJ0/David-Herasimtschuk-28.jpg)
Waterfall hiking
Proxy falls, Oregon