BIRD NOTES AFIELD 



II. Back dark brown, with or without white edgings. Head white, 

 generally streaked with dark brown. 



American Osprey 30 



III. Back reddish brown; shanks bright chestnut barred with black. 

 Head streaked black and white. Belly barred with reddish brown. 



Adult Ferruginous Rough-leg 23 



B. Under parts white or buff, conspicuously streaked, barred or spotted. 

 No solid brown patch. 



I. Upper tail-coverts white or with bars of white and brown. 



1. Upper tail-coverts pure white. Forehead and throat streaked 

 brown and rusty. 



Marsh-Hawk 15 



2. Upper tail-coverts white and brown, barred. Size, large; 

 feet powerful; throat, dark or light; tail, grayish brown, 

 barred. 



Young Western Red-tail 19 



3. Upper tail-coverts heavily barred or streaked with brown. 

 Forehead and throat white, with or without brown streaks. 



a. Feet feathered to the toes. 



a. Breast white, lightly spotted or barred. 



Young Ferruginous Rough-leg 23 



b'. Breast buffy, heavily streaked and spotted brown. 



Young American Rough-leg 22 



h. Feet not feathered to toes. Head streaked brown and white ; 

 back brown; breast buffy, heavily spotted and streaked with 

 brown. Size, large; feet, small. (See 19 above.) 



Swainson's Hawk 21 



II. No white patch on upper tail-coverts. 



I . Back slaty or lead color, sometimes brownish in tone. 



a. Breast barred with reddish brown. 



a. Head like back. Length, 1 I to 1 3 inches. 



Adult Sharp-shinned Hawk 16 



b'. Head blackish brown in contrast to back. Length, 1 5 to 

 19 inches. 



Adult Cooper's Hawk 17 



b. Breast barred with fine zigzag slat}) lines. 



Adult Western Goshawk 18 



c. Breast buffy, with dark brown streaks. Length, 1 1 inches. 



Male Pigeon-Hawk 28 



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