62 



NEW YORK STATE MUSEUM 



the percentage of stomachs containing various kinds of food than to try- 

 to estimate the percentage of each kind of food taken by the species. 

 Species marked g are near the border Hne of beneficial birds. 



Food of New York hawks and owls 



Percentage of stomachs examined containing various kinds of food 



SPECIES EXAMINED 



Beneficial 



Rough-legged hawk. . . 

 Broad-winged hawk. . . 

 Red-shouldered hawk . 



Sparrow hawk 



Red-tailed hawk (g). . . 

 Marsh hawk (g) ..... . 



Bam owl 



Long-eared owl 



Saw-whet owl 



Short-eared owl 



Screech owl 



Barred owl (g) 



Snowy owl (g) 



Injurious 



Goshawk 



Cooper hawk 



Sharp-shinned hawk. . . 



Duck hawk 



Pigeon hawk 



Great homed owl 



o 

 o 



I 



1/3 



10 



6 



3 



I 

 o 

 o 

 1/3 

 S 

 S 



36 

 23 



4 



35 



4 



25 



o 



3 

 6 



17 



9 



27 



13 



14 



4 



II 



15 

 12 



25 



49 

 66 



45 

 80 



7 



u 



H 

 10 CD 



W M 



ft. fr, 

 W tn 



2 

 18 

 10 



4 

 6 



19 

 i9(fish 2) 



4 

 3 

 2 



2 (fish i) 

 4 (fish 2) 



(fish 3) 



22 



50 

 28 



50 

 46 



56 

 82 



79 

 77 

 36 

 42 

 48 



4 



S 



4 



II 



H 

 o 



10 



19 



20 



4 

 24 

 18 

 54 



5 



7 



5 



17 



5 



40 



S3 



H 

 U 



2 



45 

 45 

 7J 



14 

 .1 



5 



7 



40 



13 



12 

 2 



4 

 10 



32 



6 



3 

 sp. g 



sp- 1/5 



4(sp 

 9(sp 



10 

 7 

 9 



16 



7 

 22 



15 

 14 

 14 

 17 

 18 



33 



32 

 30 



35 

 20 



9 

 14 



Suborder SARCORHAIVIF'HI 



Family CA.THA.RTir)A.B 



American vultures 



Characters. Bill strong, elongated, hooked at the tip and blunt; 

 nostrils large, longitudinal and perforate; head and neck rather long, bare, 

 rough and usually bright colored; tongue thick and fleshy; eyes prominent; 

 feet cltimsy and covered with small scales; front toes long, webbed at the 

 base; hind toe short and elevated; talons obtuse and only slightly curved; 

 wings very ample; 11 primaries; tail of moderate length, even or slightly 

 rounded, consisting of 12 or 14 rectrices; the basipterygoid process is present; 



