and inactive nests, respectively. Only 6.3 and 2% of the 

 active and inactive nests, respectively, were located in the 

 Mountain Mahogany Association. Productivity of Ferruginous 

 Hawk nests was 1.9 + 1.4 fledglings/territorial pair. 

 Ground squirrels ( Spermophilus spp.) accounted for 45.5% of 

 identified prey items, whereas passerines made up nearly 20% 

 of the diet of this population of Ferruginous Hawks. 

 Vegetative diversity was measured surrounding 15 active 

 nests from the Centennial Valley north to the Dillon area. 



