“ 
they traveled contained seme, rodents, and sheep, so they did not 
have to travel far for food. 
3. Coyotes released on lower levels along river bottoms and 
recovered at the headwaters of the same river or adjacent headwaters. 
Four of nine released were caught within an average of 514 miles from 
point.of release. The river bottoms in which they were released in 
May and June were near cultivated lands and hay meadows. The latter 
contained rodents. Most of the domestic stock as well as game were up 
on the higher ranges. The coyotes drifted to these ranges and were 
caught there from October ‘to December. 
4. Coyotes released in high country and recovered at lower 
altitudes. Only nine coyotes so far have been tagged for this kind 
of drift. One of a group of four released at one place is included 
under group 1, and was caught in September, but another belongs here 
and was caught in the following Jenuary 90 miles distant in an airline 
from point of release and on the winter range of sheep about 3,500 
feet lower and on a different watersned. 
These records indicate that there may be an extensive drift of 
coyotes and that the activities of the animals may be influenced by 
seasonal movements of stock and game. Extensive studies of the activi- 
ties of individual animals are planned, and it is hoped that by learn- 
ing the factors influencing drift it will be easier to direct control 
campaigns. 
Methods Employed 
As already stated, the time required for thorough study of the 
habits of destructive mammals as a basis for correct deductions is so 
great that it is necessary meanwhile to practice available methods of 
control to check depredations until preventive methods can be developed. 
Probably there will always be localities and conditions where no pre- 
ventive measures can be employed, and eliminative methods will have to 
be used. 
The procedure followed in developing artificial methods of 
control is to consider first nonpoison, and then poison, devices. 
The possibilities of trapping and shooting are first studied to learn 
if these methods can be made effective and are sufficiently economical. 
It has been found that most of the rodents are too numerous or too 
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