Mammal
Mountain Beaver
Aplodontia rufa
Photo: Lee Cain, CC BY 4.0
Common Names
Sewellel
Habitat
Fort Clatsop
Conservation
Secure
First Observed
1806-02-26
Observed At
Fort Clatsop, near present-day Astoria, Oregon
Primitive, burrowing rodent that lives among conifers. Seen only once by Corps; Lewis described pelts taken in trade.
Journal References
15 journal entries mention Mountain Beaver
May
19
1805
Seaman Bitten by a Beaver — Nearly Dies
... Montana. Lewis recorded that Seaman was "badly bitten by a beaver" after apparently catching or cornering the animal near the water's edge. The beaver severed an art...
May
28
1805
Missouri River, first view of Rocky Mountains — Joseph Whitehouse: May 28, 1805
... the opposite
Shore. we Saw a gang of Elk in this bottom, & beaver Signs
[along] the Shores. a large bottom on the S. Side. we found
an Indians (?) foot ball floating...
Jul
1
1805
Great Falls Portage — Joseph Whitehouse: July 1, 1805
...w Several Springs along the Shores. one of
the men killed a beaver. the pine and ceeder timber pleanty
along the Shores. passed clifts of rocks on each Side but
the h...
Jul
23
1805
Missouri River above Great Falls, Gates of the Mountains — Joseph Whitehouse: July 23, 1805
...ber con-
tinues on the Island [s] and along the Shores, the beaver
pleanty. the pine timber continues on the Sides of the hills at
Some distance from the River, our h...
Jul
24
1805
Missouri River above Great Falls, Gates of the Mountains — Joseph Whitehouse: July 24, 1805
... on the N. S. the prickley pear abound
on it. Saw otter and beaver in great abundence. the willow
verry thick on the Islands and along the Shores, the Currents
still ...
Aug
6
1805
Jefferson/Beaverhead River near present-day Dillon — Joseph Whitehouse: August 6, 1805
a clear morning. we Set out as usal, and proceeded on hall- ing the canoes up the rapids. the bottoms low and covered with Small...
Aug
6
1805
Jefferson/Beaverhead River near present-day Dillon — John Ordway: August 6, 1805
... it to a pole at the forks. But the pole
was green, and the beavers cut it down before Clark's arrival. In ignorance
of Lewis' note Clark proceeded, with great diffic...
Aug
6
1805
Jefferson/Beaverhead River near present-day Dillon — Patrick Gass: August 6, 1805
see if the canoes had come up that far, and came upon the north branch about 2 miles above it. Here we discovered that the...
Aug
7
1805
Jefferson/Beaverhead River near present-day Dillon — Joseph Whitehouse: August 7, 1805
a clear cool morning. one man out to hunt. we unloaded one of the Small canoes and halled it out in a grove of cotton...
Aug
7
1805
Jefferson/Beaverhead River near present-day Dillon — Patrick Gass: August 7, 1805
which was fair and clear, and where Capt. Lewis took a meri- dian altitude, which made the latitude of this place 4§ 2 53 north....
Aug
7
1805
Jefferson/Beaverhead River near present-day Dillon — John Ordway: August 7, 1805
one of the Small canoes and hailed it out in the bushes in a grove of cotton timber on L. Side of the forks and...
Aug
8
1805
Jefferson/Beaverhead River near present-day Dillon — Joseph Whitehouse: August 8, 1805
a clear cold morning. 4 hunters Sent out eairly to hunt. we Set out at Sunrise, and proceeded on passed beautiful Smooth prarie on each...
Aug
8
1805
Jefferson/Beaverhead River near present-day Dillon — John Ordway: August 8, 1805
...he prarie is covred with grass which
is high in places, the beaver abounds on these Rivers, they
have dams and ponds &. C. &. C. in different places, the Soil
of thes...
Aug
8
1805
Jefferson/Beaverhead River near present-day Dillon — Patrick Gass: August 8, 1805
...ke did not get
the note left at the point, which was that a beaver had cut
down and dragged off the pole, on which I had fixed it.
Aug
9
1805
Jefferson/Beaverhead River near present-day Dillon — Joseph Whitehouse: August 9, 1805
...d of it Soon. Some Thunder. the
Musquetoes troublesome. the beaver pleanty as usal &c.
Saw Snow on the Mountains Some distance a head. pro-
ceeded on passed the old b...