418 



ZOOLOGY— HI HDS. 



little falcon is found in their midst, and selecting his victims as whim or 

 aj)petite m-ges. They often choose the Turtle Doves, and, swooping down 

 in thy midst of a flock gathered about a pool of water, almost invariably con- 

 trive to seize one of the bewildered birds ere the surprise caused by the sud- 

 denness of the attack is over. Occasionally, however, the first swoop is 

 unsuccessful, and then they usually return to some perch near by to await 

 another opportunity ; but, when urged by hunger, I have seen a hawk, having 

 failed in his sw^oop, turn, with the quickness of thought, and pursue one of 

 the flying birds ; unless there should chance to be some thick covert hard 

 by into which the timid quarry darts and conceals itself, the race is usually 

 a short one, and terminates by the hawk bearing away his struggling victim 

 to some perch where at leisure he picks and devours his prize. 



Locality. 



Beaver Creek, Utah. 



do.... 



Provo, Utah. 



Camp Grant, Ariz. 

 do 



Gila River, Ariz .. 



Sept. 24, 1872 



do 



Nov. 30, 1872 

 May 9, 1873 

 Sept. 24,1873 

 Sept. 27, 1873 

 Oct. i6, 1873 



Dr. H. C. Yarrow and 

 H. W. Henshaw. 



do 



do 



H. W. Henshaw 



do 



do 



do 



Wing. 



7.70 

 6.88 

 6.80 

 8.10 



6.7s 

 S-72 

 5.90 

 6.60 



0.50 

 0.40 

 0.40 

 0-S3 



1.90 

 I. So 



NISUS COOPEKI (Bon.). 

 Cooper's Hawk. 



Falco cooperi, BON., Am. Orn., pi. x, f. 1, 1825. 



Astitr cooperi, Nkwr., P. K. K. Kep., vi, 1857, 74. 



Accipiter cooperi, Bd., Binl.s N. A., 1S.58, Ifi.— M, U. S. & Me.v. Bound. Surv., ii, pt. 

 ii, 1859, Birds, 3.— Heeum., P. K. K. Rep., x, pt. iv, 1859, 33.— llENitv, 

 Proc. Acad. Nat. Sci. Pliila., 1859, 104 (New Mexico).— CooP. & Suckl., 

 P. \i. R. Ri'p., xii, i>t. ii, 1800, 145.— CoUES, Proc. Acad. Nat. S(-i. Pliila., 

 1SG(!, 43.— 7rf., ib., 1868, 82.— Cooper, Birds Cal., i, 1870, 4«4.— Snow, 

 Birds Kail., 1872, 3.— GouES, Key N. A. Birds, 1872, 212, f. 140.— Allen, 

 Proc. Best. Soc. Nat. Dist., June, 1874, 34. — CouES, Birds Northwest, 1874, 

 334. 



Accipiter mexicanns, IIenky, Proc. Acad. Nat. Sci. Phila., 1.S54, 104 (New Mexico). — 

 Bd., Birds N. A., 1858, 17.— Xantus, Proc. Acad. Nat. Sci. Pliila., 1859. 190 

 (Fort Tejon, Gal.).— FIayd., Trans. Am. Pliil. Soc, xii, 1802, 152.— Coop. 

 & Suckl., P. R. R. Rep., xii, pt. ii, 1800, 14G.— Cooper, Birds Cal., i, 1870, 

 465.— Stev., U. S. Geol. Surv. Terr., 1870, 462. 



