Nebraska mammals

American Beaver in Nebraska

Castor canadensis

Native to Nebraska S5 Secure in Nebraska

Not listed as nonindigenous in Nebraska by USGS NAS; native to its Nebraska range.

IUCN Red List status

  1. LC
  2. NT
  3. VU
  4. EN
  5. CR
  6. EW
  7. EX

LC – Least Concern

Widespread and abundant; not at risk.

American Beaver in Nebraska, by the numbers

Common in Nebraska 23rd most recorded of 95 mammals logged in Nebraska

176 occurrence records
150 with iNaturalist photos
Jun 16, 2026 Last seen in Nebraska

176 total records count every Nebraska occurrence from GBIF and iNaturalist; the monthly chart covers the 171 records with a full observation date.

When to look for the American Beaver in Nebraska

Most sightings fall in April to May.

171 Nebraska occurrence records (iNaturalist and GBIF) by month of year. Shows when the species is recorded, not a guarantee of presence.

Monthly Nebraska records (table)
MonthRecords
January5
February6
March20
April50
May34
June8
July8
August5
September4
October14
November8
December9

Monthly american beaver occurrence records (iNaturalist and GBIF) in Nebraska.

Seasonality

Year-round in Nebraska, with recorded sightings peaking in April–May.

Occurrence map

Where American Beaver has been recorded in Nebraska

176 records mapped · zoom and drag to explore

176 Nebraska records mapped

Notable places to look

Park, forest, or monumentiNaturalist records
Oak Glen Wildlife Management Area 4
Missouri National Recreational River 2
Burchard Wildlife Management Area 1
Schramm Park State Recreation Area 1
Homestead National Historical Park 1
Scotts Bluff National Monument 1

Protected places with the most american beaver sightings, from the USGS Protected Areas Database plus named mountain ranges, good spots to look, not a full breakdown, so they don't sum to the total.

Where it's recorded in Nebraska

CountyRecords
Douglas County 37
Lancaster County 32
Sarpy County 23
Cherry County 8
Seward County 6
Brown County 6
Buffalo County 4
Dundy County 4
Pierce County 3
Garden County 3
Gage County 3
Lincoln County 3
32 other counties 44

The complete county distribution, spread across 44 Nebraska counties. Every occurrence record falls in one county, so these sum to the total. Counties from GBIF and US Census boundaries.

Nebraska’s beaver records follow water almost without exception, clustering along the Missouri River bluffs at Ponca State Park and Indian Cave State Park in the state’s far east and threading west along the Platte River’s braided channels and cottonwood corridors.

Built to reshape the water it lives in

A beaver needs slow-moving or still water bordered by cuttable trees, and Nebraska’s rivers supply both. Cottonwood, willow, and other softwoods line the Platte and Missouri corridors, giving beavers bark, twigs, and shoots to eat and building material for dams and lodges. Where the current runs too fast to dam, beavers dig bank burrows into the Missouri’s loess bluffs instead of building a freestanding lodge.

A spring surge in the records

Nebraska’s reports jump sharply in March through May, the stretch when ice-out opens the rivers and beavers become far easier to spot working the banks and cutting fresh growth. Records taper through summer and fall, though sightings continue in every month, consistent with a non-hibernating animal that stays active through the Nebraska winter rather than denning down for the season.

Status in Nebraska

NatureServe ranks the beaver S5, secure, and Nebraska treats it as native across the state. Its recorded range tracks the Platte and Missouri systems closely, a reminder that in a state without many natural lakes, rivers carry almost the entire story for this species.

Occurrence data from iNaturalist and GBIF.

American Beaver in other states

View all states →

More mammals in Nebraska in the atlas

Data & sources

The data and visualizations on this page draw on these open sources:

  • GBIFCC-BY 4.0occurrence records behind the range map, elevation, and record counts
  • iNaturalistCC0 / CC-BY / CC-BY-SAobservations, photos, and audio recordings
  • NatureServe ExplorerCC-BYthe state conservation rank
  • IUCN Red Listattributed factthe global conservation status
  • USGS NASpublic domainnative / introduced status
  • Natural Earthpublic domainthe relief basemap
  • USFSpublic domainnational-forest boundaries
  • USGS Protected Areas Databasepublic domainthe named parks, forests, and refuges behind "notable places to look"