Nature Notes From Crater Lake - Volume 21, 1955

Crater Lake Institute online library - www.craterlakeinstitute.com

 

 
The Giant Meadow Mouse
By Orville Page, Ranger Naturalist

The meadow mouse is rarely seen in our park, especially in the daytime. On the morning of July 17, 1955, it was my privilege to observe for a few moments two mice which I am reasonably certain were giant meadow mice, Microtus richardsoni arvicoloides (Rhoads).

My destination was Godfrey Glen and Duwee Falls, in the steep-sided Annie Creek Canyon. A short distance above Godfrey Glen, I crossed a very lush meadow area. On the upper slopes of the meadow were some small springs which formed little streams of water about six inches wide and three inches deep. As I approached one of these streams, a splashing commotion was heard. This turned out to be caused by the two giant meadow mice. They seemed frightened by my intrusion and began to swim up the little stream. The mouse in the lead swam along for about eight feet and disappeared into the grass. The second mouse swam a little way and then hid under some grass that drooped over into the stream. Only his head was visible. He apparently felt insecure, and before my camera could be focused, he followed the other mouse on up the stream and disappeared.

Meadow mice are often found around water or damp places (Cahalane, 1947; Wallis, 1947). They are very good swimmers. One meadow mouse in Michigan was observed to swim about eighty feet, part of the way under water, to escape capture.

We have many little animals in the forest that are not seen unless one gets away from the thickly populated places. While out strolling through wooded areas, the lover of nature probably enjoys most those moments when he encounters some forest animal going about his daily living habits. These forest friends will continue to live in their natural surroundings as long as the National Parks maintain natural wilderness areas. The National Parks belong to you, as an American citizen. Only your constant vigilance will keep them in their present primeval setting.

Literature Cited

Cahalane, Victor H. 1947. Mammals of North America. New York, The Macmillan Co. x, 682 pp.

Wallis, Orthello L. 1947. A Study of the Mammals of Crater Lake National Park. Unpublished Master's thesis, Oregon State College, Corvallis. 91 pp.