Smithsonian Report, 1926.—Bailey PLATE 3 
A LITTLE-USED BEAVER HOUSE 
An old beaver house, not used since the previous year, is always low and wide, with mud 
washed out of the surface layer of sticks by many rains, and the walls well settled into the 
water. When used again it will soon be built up with a high and rounded top 
A TYPICAL BEAVER COLONY IN THE MOUNTAINS 
A well-kept beaver dam, pond, and house on one of the small streams in Yellowstone Park. 
Photograph by M. P. Skinner 
