Teeth that never clock out.
Those ever-growing incisors cut wood and peel bark. Gnawing helps keep them worn down, while harder enamel at the front keeps a sharp edge.
A FIELD GUIDE FOR THE CURIOUS
Small paws.
Big impact.
Meet the little builders changing entire landscapes. A world of dams, deep dives, and extraordinary beavers is waiting just around the bend.
Let’s build a dam First, meet your engineer INSPIRED BY A BEAVER CROSSING AT OSU-CASCADES
Bend, Oregon · Made for exploring
Bend, Oregon · Made for exploring
FIELD NOTES / 001NORTH AMERICA
The original ecosystem engineer.Castor canadensis
A LITTLE CURIOSITY GOES A LONG WAY.Follow the water
01
North America’s largest rodent
02
Plant eater. Landscape maker.
03
Get to know the species
Built for water. Busy after dark.
01 / MEET YOUR ENGINEER
Not just a pretty tail.
Part lumberjack. Part architect. Entirely remarkable. Here’s your introduction to the North American beaver.
A tail with many talents.
A broad, flat tail helps with steering and balance. A loud slap on the water signals danger. Webbed hind feet provide most of the swimming power.
Better built together.
Beavers live in family groups: parents, young kits, and often yearlings. They’re mostly active at dusk and at night, and they don’t hibernate.
Field notes informed by ODFW: Living with Beavers and ODFW’s species guide .
02 / ONE BRANCH AT A TIME
A stream. A plan.
A whole new world.
How does a beaver actually build a dam? Follow the transformation, from the first stick to a thriving wetland.
AN INTERACTIVE FIELD NOTETHE STREAM / BEFORE THE BUILD
STEP 01 / 05
First, find the right flow.
A beaver looks for a small stream with a gentle gradient, a steady supply of water, and woody plants nearby. A dam can turn shallow running water into a deeper, safer place to live.
Why deeper water? It helps beavers reach food and enter their shelter underwater, away from many land predators.
A dam isn’t a house. It holds back water. A lodge or bank den is the home. And beavers in naturally deep water may not need a dam at all. Explore the science
MORE THAN A POND.
A place for life.
Courtney Celley / USFWS · MinnesotaA place for life.
03 / THE RIPPLE EFFECT
One small builder.
Countless neighbors.
A beaver changes the water. The water changes everything else. That’s why these animals are called ecosystem engineers.
01
Slow water. Store possibility.
Dams slow the flow, help water spread into floodplains, and can raise the local water table.
02
Make room for more life.
Ponds and wetlands provide habitat for frogs, waterbirds, insects, and fish. In suitable places, pools offer young salmon food and shelter.
03
Keep a little green in the landscape.
Wet streambanks can help buffer dry conditions and slow wildfire spread. Dams can also trap sediment and reduce bank erosion.
Good neighbors need good planning. Rising water can also flood roads and property. Coexistence tools can help; don’t alter a dam or relocate wildlife yourself. Get guidance from ODFW
A NOTE FOR YOUR NEXT WALK
Look for the work, not just the worker.
Freshly gnawed stumps, peeled sticks, and quiet ponds can be clues. Watch from a distance, keep dogs leashed, and leave dams and lodges undisturbed. A crossing sign is an invitation to notice—not a guarantee of a sighting.
04 / DOWN THE NEXT RABBIT—ER, BEAVER—HOLE
Keep your curiosity flowing.
No dead-end facts. Follow these trails into wildlife biology, coexistence, and Oregon history.
START HEREMeet the
Better neighbors.
The animal that
Meet the
American beaver.
Biology, family life, habitat, and what to look for in Oregon.
OREGON DEPT. OF FISH & WILDLIFE LIVE ALONGSIDE THEMBetter neighbors.
Healthier waters.
Wetland benefits, practical coexistence, and help for landowners.
OREGON DEPT. OF FISH & WILDLIFE GO A LITTLE DEEPERThe animal that
shaped a state.
Explore beavers, the fur trade, and Oregon’s ecological history.
THE OREGON ENCYCLOPEDIAA FEW GOOD QUESTIONS
Wait, so…
Do beavers eat the wood they cut?
They eat plants, including leaves, twigs, aquatic vegetation, and the softer inner bark of woody plants. They don’t eat fish. Some branches are food; others become construction material. Read ODFW’s guide.
Do they use their tails to pack mud?
Not like a trowel! Beavers use their front paws to handle and pack material. Their tails help with balance on land and steering in water, and a tail slap can warn of danger. Learn more about their adaptations.
Is every big pile of sticks a dam?
No. A dam is a barrier across flowing water. A lodge is a shelter, often built from branches and mud, with an underwater entrance and a living chamber above the waterline. Some beavers live in dens dug into a bank instead. Explore beaver habitats.
Should I build a dam to help beavers?
Enjoy the illustration, but leave real streams to wildlife and qualified restoration teams. Changing a waterway can affect fish passage, flood nearby land, and require permits. Contact ODFW for local advice, and never approach or disturb an occupied lodge. Find coexistence guidance.
05 / RIGHT HERE IN BEAVER COUNTRY
A natural connection.
A very Oregon story.
This guide started with a beaver crossing sign at OSU-Cascades in Bend. But the connection between beavers and Oregon State runs much deeper than a sign.
The beaver is Oregon’s state animal and appears on the reverse of the state flag. At Oregon State University, it’s also a shared identity: the Beavers.
Discover OSU’s traditionsFROM THE ARCHIVES
1916
A name takes root.
The school yearbook became The Beaver, helping associate the beaver name with Oregon State.
1952
Meet Benny.
Benny Beaver made his costumed debut on September 18 and became the university’s official mascot.
Same university. High Desert home.
OSU-Cascades is Oregon State University in Bend, bringing the Beaver connection to Central Oregon. Get to know the campus