283 



► 



commonly build several nests within their territories and 

 use them alternately between years (Call 1978). A nest 

 may be used again, even if it has been inactive for 

 several years. 



All known raptor stick nests, including those originally 

 built by red-tailed hawks, should be monitored for use by 

 "special interest" species until mining actually takes place, 

 Raptors often rebuild and use nests originally constructed 

 by other species. 



7. Minimize disturbance of active raptor nests during the 



breeding season (April-July). Disturbance during incubation 

 can cause egg mortality from predation or exposure after an 

 incubating bird is flushed, or abandonment of the nest. 

 Disturbance of nests with nestlings can cause mortality 

 from exposure, interrupted feedings and premature fledging. 



