THE LODGE 79 
little stream in the Yellowstone a lodge in one pond was 
inhabited by a family of eight beavers, and three others were 
living in a burrow a few ponds below. It is said that the 
male beaver, as the time approaches for the annual addition 
to his family, removes to a burrow and remains there several 
weeks. 
I have been unable to obtain much information as to the 
length of burrows. One which I examined in the Yellow- 
stone had a total length of thirty feet, but that struck me as 
unusual, though Bailey says they are sometimes forty to 
fifty feet long, and large enough for a man to crawl into. 
Various burrows examined by Morgan terminated under the 
roots of trees. ‘Those which he described were from ten to 
over thirteen feet long, some leading from ponds, and one 
from a canal. He gives a diagram of the latter showing at 
the end a chamber 2 feet 6 inches by 3 feet 2 inches, and 
about ten inches high. ‘‘The roof of the latter came near 
to the surface, and was formed chiefly of the roots of the 
clump of trees under which it was excavated.”’ 
