. The birds of Illinois and Wisconsin. Birds; Birds. 146 Field Museum of Natural History—Zoology, Vol. IX. Rump and upper tail coverts, dark brown; breast, streaked with dark brown; no rufous brown on tail; second primary, longest (immature); back and rump, slate color (adult). Falco columbarius, and races. Pigeon Hawk. See Nos. 170, 170a. GROUP 2. Wing, to inches long. Second primary, longest. Falco columbarius, and races. Pigeon Hawk. See Nos. 170, 170a. Fourth primary, longest; outer tail feather, three-quarters inch or more shorter than middle feather; tail, usually more than
. The birds of Illinois and Wisconsin. Birds; Birds. 146 Field Museum of Natural History—Zoology, Vol. IX. Rump and upper tail coverts, dark brown; breast, streaked with dark brown; no rufous brown on tail; second primary, longest (immature); back and rump, slate color (adult). Falco columbarius, and races. Pigeon Hawk. See Nos. 170, 170a. GROUP 2. Wing, to inches long. Second primary, longest. Falco columbarius, and races. Pigeon Hawk. See Nos. 170, 170a. Fourth primary, longest; outer tail feather, three-quarters inch or more shorter than middle feather; tail, usually more than long. Accipiter cooperii. Cooper's Hawk. See No. Siiarp-shinned Hawk. Fourth primary, longest; outer tail feather, less than three-quar- ter inch shorter than middle feather; tail, usually less than long. Accipiter velox. Sharp-shinned Hawk. See No. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Cory, Charles B. (Charles Barney), 1857-1921. Chicago
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