122 B. Collett. [No. 1 



The Inhabitants of the Lodge. It is probable that each 

 Lodge is only occupied by one couple with their (small) young. 



The members of older titters, provided they have not migrated, 

 live in burrows, or tunnels in the neighbourhood. 



Single small, and hastily constructed Lodges are, probably, 

 only occupied by one individual. 



Dams. Dams are formed where the Beavers have established 

 themselves by gently flowing streamlets or ponds, in order to regu- 

 late the height of water, thereby forming an artificial lake by the 

 side of which the Lodge can be subsequently constructed. They 

 are substantially built and difficult to demolish. 



One which I examined at Treungen, July 1895, was formed at 

 the ontflow of a forest marsh, through which a streamlet trickled. 

 Where formerly there was but a pool, there lay a pond some few 

 hundred yards in diameter. The dam was entirely built in the 

 course of three weeks in the summer of 1890. Its length was 14 

 métres, cross section 2 métres. (Pl. V). 



The Lodge was situated on the eastern bank of the pond, and 

 was conical in shape. (Pl. VI). 



Winter Existence. During winter the Braver remains quietly 

 in its Lodge, without, however, hibernating. Sometimes, however, one 

 can see, from its spoor in the snow, that it has been out in search 

 of food. Sometimes it is obliged to proceed with the building 

 during winter. when the weather is mild, and it has not completed 

 its task during the Autumn. 



Occasionally the snow melts from the roof of the Lodge during 

 the winter, occasionally not. 



Migration. The young Beaver soon leaves home to found a 

 family for itself, or to seek a new resort. Its wanderings may 

 extend a distance of many miles, and lead over the broad slopes 

 of the mountains, provided it there meets with tårns and streams 

 and. occasionally, for a short distance, even through the sea (salt 

 water); see p. 25. Owing to this, remote valleys may suddenly 

 become frequented by one or more- individuals, which endeavour to 

 settle there. This was thus the case in Suldal, and Røldal in 1891 

 (See p. 53). 



Many individuals are lost during the migrations. Even semi- 

 adult individuals may be met with migrating. 



