.342 



P RED AT I ON 



TABLE 1.5. I'HOPORTION OF DIFFERENT TYPES OF FOOD IN PELLETS OF THE 

 GREAT HORNED OWL EXAMINED BY THE INVESTIGATION— 1930-1942 



dance at the same time. A miiiiher of skunks were recorded as well as weasels, an opossum, 

 crows, two screech owl.s. a Cooper's hawk ami a sharj)-shiiinr(l hawk. 



Grouse have occurred in onlv about 5 per cent of the material examined, a proportion 

 very similar to that noted for the fox. Both adults and chicks have been identified. 



PELLET OF GREAT HORNED OWL SHOWING GROUSE REMAINS AND SUSCEPTIBIL- 

 ITY TO DISINTEGRATING OF PELLETS COMPOSED OF THIS SORT OF MATERIAL 



Small birds were found more frequently in the stomach material than in the pellets. 

 They were taken more often in summer than at other seasons. Miscellaneous items have 

 included a considerable number of garter snakes, frogs, salamanders and crayfish. 



Analysis of 983 great horned owl stomachs from Pennsylvania*" also showed grouse to 

 have been taken only a relativcK few limes il.l per cent) while small mammals, mainly 

 rodents, were the [irincipal bill of fare. 



Barred Owl 



None of the barred owl stomachs held grouse and its remains have been found in onlv 



