368 PIGEON HAWK. 



phagus is 7i inches long ; the crop 2 inches in width. The stomach 

 has a diameter of 2 inches 2 twelfths. The intestine is 4 feet 6 inches 

 long, its width varying from 4 twelfths to 2^ twelfths. The coeca are 

 3 twelfths long, 1^ twelfth in breadth ; the diameter of the cloaca 1^ 

 inch ; its distance from the coeca 1-^ inch. 



The trachea is 5 inches 4 twelfths long, its breadth from 5^ twelfths 

 to 4^ twelfths ; its rings 80 ; the bronchi with 15 and 18 rings. 



PIGEON HAWK. Falco columbarius. 



PLATE XCII. Vol. I. p. 466. Male and Female. 



P E T I T C A P O R A L. Falco temerarius. 







PLATE LXXV. Vol. I. p. 38L Adult Male. 



The bird represented in the last-mentioned plate, and described 

 under the name of Falco temerarius, was merely a beautiful adult of the 

 Pigeon Hawk, F. columbarius. That figure, and the two of the same 

 species in Plate XCII, will afford a good opportunity of judging of the 

 differences, as to size and colour, that occur in this species. The great 

 inferiority in size of the individual represented as F. temerarius, was 

 the cause of my mistaking it for a distinct species ; and I have pleasure 

 in stating that the Prince of Musignano was the first person who 

 pointed out my error to me soon after the publication of my first 

 volume. 



The Pigeon Hawk ranges very extensively over the United States, 

 and extends its migrations far beyond their limits on either side. Dr 

 TowNSEND found it on the Rocky Mountains, as well as along the 

 shores of the Columbia River. Dr Richardson mentions it as not 

 uncommon about York Factory, in latitude 57°, and it is not impro- 

 bable that it wanders farther, as he speaks of having seen a small hawk 

 on the north shore of Great Bear Lake, in latitude QQ°, which may 

 have been a male as small as the one represented in my plate. I found 

 it very abundant in the Texas early in May, when I shot as many as 

 five on a small island in a short time. 



Mr Hdtchins's description of the eggs of this bird, which he says 

 are white, and from two to four in number, as well as the situation of 



