Welcome to the Leaf Pack Network, an international network of people investigating their local stream ecosystems. Leaf Pack Network is part of WikiWatershed, an initiative of Stroud Water Research Center to help people advance knowledge and stewardship of fresh water.

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Leaf Pack Methods Video: Placing Packs in the Stream
/ Methods, News, Video

Grab Your Leaf Pack Network Manual and Follow Along With These Methods Videos

Whether you're new to the Leaf Pack Network or just need a refresher, our methods videos are a great way to supplement the material in the Leaf Pack Network Manual.
Environmental educator working with middle school students.
/ News, Video, Webinar

Leaf Pack Through the Ages: Monitoring With Students From Middle School to College

Learn from Leaf Pack Network® “superstars” as educators and partners share tips and tricks of engaging students in the Leaf Pack Network.
Simulated screenshots of PocketMacros app
/ Macroinvertebrates, News

Dive Into PocketMacros, a Free Mobile App Version of Macroinvertebrates.org

PocketMacros features nine orders of aquatic insects, plus other benthic macroinvertebrates commonly used in water quality biomonitoring and environmental education, with 150 taxa total.
Virtual macroinvertebrate sorting in the Leaf Pack Network Simulation.
/ Leaf Pack Experiment, News

Introducing the Leaf Pack Network Simulation

This virtual learning resource helps anyone anywhere to simulate multiple stream studies and compare results — all from the other side of a screen!
Photo of a hand holding a wet leaf with aquatic macroinvertebrates clinging to it.
/ College, Leaf Pack, Macroinvertebrates, News

Leaf Pack Network Adds Hands-On Experience to Virtual Learning

A Canadian university is making sure students get fieldwork experience despite the pandemic — by mailing them freshwater field kits to use at home.
Aquatic Macroinvertebrates in Motion Videos
/ Macroinvertebrates, News, Video

Aquatic Macroinvertebrates in Motion Videos

Explore our video library of aquatic macroinvertebrates wriggling, swimming, and crawling through stream water!
ROCK ON With Rock Pack Experiment Videos

ROCK ON With Rock Pack Experiment Videos

Designed for 7th-12th grade learners and adult audiences, this video series provides an in-depth look into caddisfly ecology, ecosystem engineering, fluvial geomorphology, and more.
2020 Leaf Pack Network Updates and New Kit Reveal!
/ Leaf Pack, News, Video

2020 Leaf Pack Network Updates and New Kit Reveal!

Join Leaf Pack Network Administrator and freshwater ecologist, Tara Muenz, for a tour of the new Leaf Pack Stream Ecology Kit features PLUS an introduction on how YOU can get started with the Leaf Pack Network!
Check Out Our New YouTube Channel
/ Methods, News, Video

Check Out Our New YouTube Channel

Check back regularly for new additions, or better yet, subscribe to the channel to be notified of new videos!
Leaf Pack Network Data Can Now Be Entered Into the Water Quality Mobile App!

Leaf Pack Network Data Can Now Be Entered Into the Water Quality Mobile App!

The app helps users log and share data they collect in the field, interpret the data through learning pop-ups, and export it to create databases.
Dive into Water Science Careers!
/ News, Video

Dive into Water Science Careers!

Ever want to spend a day in the boots of a freshwater scientist? Our Water Science Career Videos engage viewers of all ages in real careers in freshwater-focused science, technology, engineering, and math.
Exploring Ecosystem Engineers With the Rock Pack Experiment

Exploring Ecosystem Engineers With the Rock Pack Experiment

Scientists and educators from Montana State University and Stroud Water Research Center have created an exciting extension of the Leaf Pack Network: the Rock Pack Experiment.
Introducing the Monitor My Watershed Data Portal

Introducing the Monitor My Watershed Data Portal

The Monitor My Watershed® data portal lets you share your Leaf Pack Network® data with the world and explore do-it-yourself environmental sensor datasets.
New Leaf Pack Stream Ecology Kit Featuring Sensitivity Groups
/ Leaf Pack, News

New Leaf Pack Stream Ecology Kit Featuring Sensitivity Groups

Announcing the release of the updated kit featuring a new dichotomous key, new sorting sheet, updated manual, and a simplified biotic index calculation.
What's the Best Time to Do a Leaf Pack Experiment?
/ Leaf Pack Experiment, News

What’s the Best Time to Do a Leaf Pack Experiment?

Fall is a great time to do a leaf pack experiment — but not the only time! If you can't do an experiment in the fall you can still collect
Leaf Pack News from Washington County Watershed Alliance
/ News,

Leaf Pack News from Washington County Watershed Alliance

The WCWA, which enhances and coordinates the activities of individual watershed associations, tweeted about their recent leaf pack experiment.
Ecosystem Benefits of Net-Spinning Caddisflies
/ Macroinvertebrates, News, Video

Ecosystem Benefits of Net-Spinning Caddisflies

Net-spinning caddisflies build nets to trap their food. But did you know that these nets also hold rocks together in streams?
Temporary Data System is Live
/ Data, Leaf Pack Experiment, News

Temporary Data System is Live

The old leaf pack database finally bit the dust, but a temporary system for entering and viewing new data has been put in place while we rebuild it.
Leaf Pack Network Database is Down
/ News

Leaf Pack Network Database is Down

The system for logging in, viewing historic data, and registering with the Leaf Pack Network is currently unavailable. We are working to bring it back (better than ever!) by fall.
Leaf Pack Network Newsletter #16, Fall 2016

Leaf Pack Network Newsletter #16, Fall 2016

In this issue: Leaf Pack webinar recording; workshop recap; new groups and projects; how to choose mobile digital technologies to enhance environmental education.
Restoring Nash Creek
/ News, Video

Restoring Nash Creek

Students in Michigan discovered what was impacting their stream and then developed a plan to restore it with native plantings.
Leaf Pack Network Newsletter #15, Spring 2016

Leaf Pack Network Newsletter #15, Spring 2016

In this issue: Leaf Pack Network is 15 Years Old; Expanded WikiWatershed® Toolkit Debuts; Welcome New Groups; Macroinvertebrate ID; Amazing Mayfly Video.
Leaf Pack Network Newsletter #14, Fall 2015

Leaf Pack Network Newsletter #14, Fall 2015

In this issue: Where to find LPN online; Our Newest Ambassador; Leaves, Leaves Everywhere; Macroinvertebrates.org; Leaf Pack Experiment Video; Trout Grow on Trees.
Watch webinar recordings and other videos.
/ News, Video

Leaf Pack Stream Ecology Kit

Students will learn to design, implement, and analyze a scientific investigation while discovering the value of aquatic macroinvertebrates as living indicators of water quality. The kit is reusable and flexible, adaptable to
Educating to Ensure Water Quality and Availability
/ News, Presentations

Educating to Ensure Water Quality and Availability

Christina Medved gave a leaf pack presentation at the Pennsylvania Association of Conservation Districts Environmental Education Conference and she gave a three-hour “Streams Within a Watershed Context” workshop at Kean University.
Leaf Pack Administrator Shares Knowledge at Society for Freshwater Science Meeting
/ News, Presentations

Leaf Pack Administrator Shares Knowledge at Society for Freshwater Science Meeting

Education Programs Manager and Leaf Pack Network® Administrator Christina Medved attended the annual meeting of the Society for Freshwater Science held in Jacksonville, Fla., in May 2013.
Educators Talk Leaf Pack at Conferences
/ News, Workshops

Educators Talk Leaf Pack at Conferences

With the support of the LaMotte Company, Christina Medved attended the National Science Teachers Association Area Conference in Atlanta to provide a Leaf Pack Workshop and help promote LaMotte and Stroud’s Leaf Pack Experiment Kit.
Using Leaf Packs to Measure Water Quality in Peru
/ News

Using Leaf Packs to Measure Water Quality in Peru

ACEER and Stroud Water Research Center used leaf packs and direct collection of macroinvertebrates to assess stream health along the Transoceanic Highway.
Leaf Pack Workshop in Gettysburg
/ News, Workshops

Leaf Pack Workshop in Gettysburg

Nine individuals participated in a two-day Leaf Pack Network workshop at Gettysburg College. School teachers took the workshop in efforts to better understand stream ecology and also to be introduced to a new method of sampling streams — using leaf packs.
Leaf Pack and Watershed Tour™ Workshop at Regional Conference for National Science Teachers Association
/ News, Teachers, Workshops

Leaf Pack and Watershed Tour™ Workshop at Regional Conference for National Science Teachers Association

In collaboration with LaMotte, Stroud Water Research Center educator Christina Medved led two workshops at the regional NSTA conference in Nashville in December 2011.
Leaf Pack Workshops at Wilson College, National Science Teacher Association Conference
/ News, Teachers, Workshops

Leaf Pack Workshops at Wilson College, National Science Teacher Association Conference

Stroud Education Program Manager Christina Medved led a two-day Leaf Pack Network workshop for 16 teachers at Wilson College, Chambersburg, Pa. The teachers learned about general stream ecology and how to sample streams using leaf packs.
Medved Interviewed About Leaf Pack
/ News, Workshops

Medved Interviewed About Leaf Pack

John Latimer, a staff writer with the Lebanon Daily News, met up with Christina Medved to get the scoop on why a group of teachers, ecologists, and municipal officials were getting their feet wet in Raccoon Creek.
Leaf Pack Network Helps Urban Kids Explore Salty Waters in Death Valley
/ Leaf Pack Experiment, News

Leaf Pack Network Helps Urban Kids Explore Salty Waters in Death Valley

If you visit Salt Creek, Death Valley on any given afternoon in the spring, you might have to navigate through school kids staring into the frothing waters. The kids have come to make leaf packs, designed as a tool to assess stream health, but have stopped to watch the pupfish breed in the shallow rivulets of Salt Creek.
Expanding the Leaf Pack Network to South and Central America
/ International News, News, Workshops

Expanding the Leaf Pack Network to South and Central America

In two packed workshops, Dr. Bern Sweeney and Christina Medved introduced the new Spanish-language version of Leaf Pack during a weeklong program in the Amazonian headwaters of Peru — the latest development in ongoing efforts to expand the program across Latin America and ultimately around the world.
Educators Present Leaf Pack Workshop in Costa Rica
/ International News, News, Workshops

Educators Present Leaf Pack Workshop in Costa Rica

Stroud Water Research Center Educators Christina Medved and Jamie Blaine traveled to Baru, Costa Rica to present a Leaf Pack workshop for local communities to learn about ways to monitor and protect their natural resources.
Leaf Pack Network News, Fall 2010

Leaf Pack Network News, Fall 2010

In September 2009, Yosemite Institute began using leaf packs to study macroinvertebrates in four streams in Yosemite Valley. Students have been studying water chemistry in these streams for several years but institute staff felt that biomonitoring would provide a more accurate measurement of the health of these ecosystems.
Leaf Pack Experiment Takes Learning Into the Field
/ News, Video

Leaf Pack Experiment Takes Learning Into the Field

This video highlights the partnership between Stroud Water Research Center, Riverkeeper, and Hudson Basin River Watch in the early 2000s. The Leaf Pack experiment involves creating an artificial leaf pack,
Leaf Pack Network Newsletter #13, Winter 2009-2010

Leaf Pack Network Newsletter #13, Winter 2009-2010

In this issue: Peruvian Leaf Pack; Macroinvertebrate Review: Scuds vs. Sowbugs; Changing Lives & Communities in Costa Rica.
Breaking New Ground By Studying Bugs

Breaking New Ground By Studying Bugs

David C. Richardson wrote in the professional journal Stormwater about Forest Grove Community School in Oregon and Mahopac High School in New York, two of the schools that are using the Leaf Pack Experiment and getting results that are making a real difference to their communities.
Leaf Pack Network Newsletter #12, Summer 2009

Leaf Pack Network Newsletter #12, Summer 2009

In this issue: First Leaf Pack Workshop in Costa Rica; Macroinvertebrate Review: Blackflies vs. Midges; Leaf Pack Workshop: the Guatemalan Experience.
Linking Kids to Their Environment and Community
/ News

Linking Kids to Their Environment and Community

Charlie Graham teaches all subjects, including science, at Forest Grove Community School. He takes his job seriously and gets genuine enjoyment from watching his students connect the dots and understand their relationship to the environment. So, it’s no wonder that he is a fan of the Leaf Pack Experiment Kit.
Five Days + Seventeen People = A World of Promise

Five Days + Seventeen People = A World of Promise

For the 17 biologists, conservation workers and educators from Costa Rica, Guatemala, Mexico, Peru and the United States who took part in a total immersion Leaf Pack Ambassador workshop, the third week in October was an intense time that held great promise.
Leaf Pack Network Newsletter #11, Fall 2008

Leaf Pack Network Newsletter #11, Fall 2008

In this issue: Leaf Pack Ambassadors: Leaf Pack Goes Spanish; Macroinvertebrate Review: Mayflies vs. Stoneflies; News And Success From The Classroom; Online Macroinvertebrate Key.
Spanish-Language Leaf Pack Experiment Kit Pilot Program
/ International News, News, Workshops

Spanish-Language Leaf Pack Experiment Kit Pilot Program

“Gracias por esta oportunidad,” wrote Gabrielle Gutierrez, a biology teacher at the Guanacaste Conservation Area in northern Costa Rica very near Stroud Water Research Center’s tropical stream laboratory at the Maritza Biological Station. “Thank you for this opportunity.”
Leaf Pack Network Newsletter #10, Fall 2007

Leaf Pack Network Newsletter #10, Fall 2007

In this issue: High School Students Teach New York City Residents About Drinking Water; Macroinvertebrate Review: Corydalidae vs. Hydropsychidae; Macroinvertebrate Images for Classroom Use.
Leaf Pack Network Newsletter #9, Spring 2007

Leaf Pack Network Newsletter #9, Spring 2007

In this issue: High Schoolers To Walk Entire Length of NYC Water Supply System!; Leaf Pack in Guatemala; Leaf Pack Goes to Summer Camp; High Schoolers Use Leaf Pack To Teach First Graders.
Leaf Pack Network Newsletter #8, Fall 2006
/ International News, Newsletters

Leaf Pack Network Newsletter #8, Fall 2006

In this issue: Leaf Pack Across the Americas; NOAA Chesapeake Bay Leaf Pack Grant; Teachers Within the New York City Drinking Water Watershed: Meet Your Local Leaf Pack Coordinators.
Photo of Mahopac High School student and teacher conducting a Leaf Pack Experiment

Expanding the New York City Watershed Leaf Pack Network

Riverkeeper, Stroud Water Research Center, and Hudson Basin River Watch partnered to implement a program to harness kids’ fascination with bugs in order to measure water quality in the New York City Drinking Water Supply Watershed.
Leaf Pack Network Newsletter #7, Fall 2005

Leaf Pack Network Newsletter #7, Fall 2005

In this issue: How Do Scientists Tie A Leaf Pack?; Idaho State University Brings Leaf Pack Experiments To High School Students; Leaf Pack Goes International Again!
Leaf Pack Network Newsletter #6, Spring 2005

Leaf Pack Network Newsletter #6, Spring 2005

In this issue: Science Fair Winner; First Oregon Leaf Packers Study Threatened Stream; First Maryland Leaf Packers: Community Collaborative Comparing Urban and Rural Streams.
Leaf Pack Network Newsletter #5, Winter 2004-2005
/ College, International News, Newsletters

Leaf Pack Network Newsletter #5, Winter 2004-2005

In this issue: Kenya Update: Nobel Peace Prize Winner, Stroud Center Partner; Penn State Leaf Pack Project.
Leaf Pack Network Newsletter #4, Fall 2004

Leaf Pack Network Newsletter #4, Fall 2004

In this issue: Into the Classroom: Clearpool Education Center; Students in Kenya Do the Leaf Pack Experiment; Interview with a Scientist; Funny Leaf Pack Stories.
Leaf Pack Network Newsletter #3, Fall 2003
/ Citizen Science, Newsletters

Leaf Pack Network Newsletter #3, Fall 2003

In this issue: Our Leaf Pack Experiment is Done … Now What?; How Students in Kenya Are Using the Leaf Pack Experiment; New Aquatic Macroinvertebrate Life Cycle & Habitat Flashcards.
Leaf Pack Network Newsletter #2, Winter 2003
/ High School, Newsletters, Tips and Tricks

Leaf Pack Network Newsletter #2, Winter 2003

In this issue: Pennsylvania High School’s Leaf Pack Experiment; How Not to Lose a Leaf Pack.
Leaf Pack Network Newsletter #1, Fall 2002
/ Leaf Pack Experiment, Newsletters

Leaf Pack Network Newsletter #1, Fall 2002

In this issue: Fall is the Best Time For Leaf Pack Experiments; Summer 2002 Update.
Students in Kenya Do the Leaf Pack Experiment
/ International News, News

Students in Kenya Do the Leaf Pack Experiment

At the end of her visit to Stroud Water Research Center, Nobel Prize nominee Wangari Maathai, was given a Leaf Pack Kit with the hope that she could engage students in Kenyan schools in a new and exciting approach to conservation.