settlers, he will move to a permanent home in 

 lands far distant. It would be comparatively easy 

 for a grizzly to become acquainted with four or five 

 thousand miles of territory. He travels rapidly, has 

 endurance, and in a single night could cover a hun- 

 dred miles or more. 



Some bears get the idea of territorial expansion 

 and go forth to seize a part of a neighbor's hunting- 

 ground. Thus one bear may be annoyed by another 

 who makes too frequent raids into his domain, and 

 feel called upon to defend his territory against the 

 invader. When past prime a bear is sometimes 

 driven forth into an unfriendly world by a young, 

 vigorous conqueror. 



On one occasion I tracked a grizzly for sixty 

 miles from the margin of its home range. It trav- 

 eled along a line that indicated it had a definite 

 place in mind to which it was going. It explored a 

 canon region, and, a day or two later, as tracks in 

 the snow showed, went back to its old range along 

 the trail it had followed in leaving it. 



Going one autumn from Estes Park to North 



Park, Colorado, I came upon a grizzly's track in 



the upper end of Forest Canon. For several miles it 



had followed an old wild-life trail. It crossed the 



56 



