. The birds of eastern North America known to occur east of the ninetieth meridian [microform]. Birds; Birds; Oiseaux; Oiseaux. 17U KKY TO TIIK IIIUDS uF KASTKUN NOKTH AMKUI(^\* Group 5. Wing, 15 to 17 inches long. Section 1. Second primary, longest; only first primary, emarginate, or notched. \ I. Duck Hawk. Leiif^th, under 10 • i)riiu;iries. dirk hrowii, baiuU'd on inner welt witli pale rufous. Duck Hawk. Falcii j>er<'(jriniiti (tnntnm. See No. 25)1. Lenfjth, (tv(M' 10; under tail coverts, white, witliout i^pots. White Qyrfalcon. Falcn isbtndus, and races. See No. 280. Lenj^th, over 19
. The birds of eastern North America known to occur east of the ninetieth meridian [microform]. Birds; Birds; Oiseaux; Oiseaux. 17U KKY TO TIIK IIIUDS uF KASTKUN NOKTH AMKUI(^\* Group 5. Wing, 15 to 17 inches long. Section 1. Second primary, longest; only first primary, emarginate, or notched. \ I. Duck Hawk. Leiif^th, under 10 • i)riiu;iries. dirk hrowii, baiuU'd on inner welt witli pale rufous. Duck Hawk. Falcii j>er<'(jriniiti (tnntnm. See No. 25)1. Lenfjth, (tv(M' 10; under tail coverts, white, witliout i^pots. White Qyrfalcon. Falcn isbtndus, and races. See No. 280. Lenj^th, over 19; under tail coverts, marked with dusky or .spotted. Gray Qyrfalcon. Fulco ruxtkoUts. See No. 287. (li. 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 : Field Columbian Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbirds, booksubjectois
