Nature Notes From Crater Lake
Volume 4, No. 1, July 1931
Beavers in the Park
By D. S. Libbey
This season we are delighted to learn that within the area of Crater
Lake National Park we have living colonies of the American Beaver
(Castor Canadensis Pacificus), the national emblem of our sister
nation to the north. It is the largest rodent on the continent and a
member of the squirrel family which as adapted itself to life in the
water.
Mr. Fred Patton, one of the oldest employees of Crater Lake National
Park, called our attention to numerous beaver dams and fresh beaver
cutting along the west margin of the park in the vicinity of Copeland
Creek. Mr. Patton discovered the beaver activity while engaged in his
work of opening a motor way.
Specimens of the fresh beaver cuttings have been placed on exhibit in
the Community House and it is the plan to have guided motor caravans
conducted to the scene of the activity by the ranger force. Also very
careful efforts will be made to have the area adequately patrolled to
preserve the colony of beavers and to prevent their extermination by
poachers in the subsequent trapping season.
The pelt of the beaver is connected with the earliest exploration of
North America, and fur trading in the days of the Old West was carried
on extensively. Vast areas were discovered and developed because of the
powerful incentive to seek out the beaver and obtain his pelt.
It is our goal to preserve our beaver friends. Their works have never
ceased to be of perennial interest to man. So extensive the dam, so
large the trees felled by no other tools than their chisel-like
incisors, and so great the tracts of land flooded by the dams that the
beavers have become known as the emblem of industry.
A beaver dam is never complete. The busy colony is constantly
repairing it, adding fresh cuttings and shifting driftwood, stones and
earth so that they are inextricably piled together. The obstructions
create the pools of still water so desired by the beaver, and the
cuttings from last winter show clearly the snow levels at which the
animals were able to work.
The series of dams has materially changed the erosional activity of
the creek and has resulted in basins which are splendid reservoirs for
catching and preserving vegetable life which slowly decomposes and
yields the necessary humus material. This results in offering favorable
food supply for a more vigorous growth of flowers and trees which find
their ideal habitat in a swamp.
The series of beaver colonies was found about the 5,250 foot
elevation in the park.
