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THE RAPTORIAL BIRDS OF IOWA 



Fig. 65. The Pigeon Hawk. 



Subgenus Tinnunculus Vieillott. 



20. FALCO COLUMBARIUS COLUMBARIUS Linnaeus. 357. 



Pigeon Hawk. 



Field Characters. A small slaty-bluish or brownish hawk, 

 streaked below ; tail with four or five grayish bands ; wings pointed. 



Description. Above, slaty-bluish, except buffy on the neck; tail 

 with four or five lighter bands and white tip. Flight feathers, white- 

 barred. Below, buffy with black streaks, except on throat. 



Immature birds: Above dusky brownish, flight feathers barred 

 with buff. 



Measurements. Length, 10 to 13 inches; wing, 7 to 8.50 inches; 

 tail, 5 to 5.50 inches. 



