. The birds of Illinois and Wisconsin. Birds; Birds. Jan., 1909. Birds op Illinois and Wisconsin — Cory. 47 *GROUP 5. Wing, over 17 inches long. Primaries, marked with more or less black. Larus marinus. Great Black-backed Gull. See No. 15. No black on primaries. Larus hyperboreus. Glaucous Gull. See No. 13. Subfamily STERNIN^. Terns. Upper mandible, nearly straight, not hooked or decidedly rounded near tip; nostrils, in basal half of bill; outer tail feathers, usually longer than middle feathers; toes, four; front toes, webbed; hind toe, small, but well Common Tern. *GROUP 1. Wing,
. The birds of Illinois and Wisconsin. Birds; Birds. Jan., 1909. Birds op Illinois and Wisconsin — Cory. 47 *GROUP 5. Wing, over 17 inches long. Primaries, marked with more or less black. Larus marinus. Great Black-backed Gull. See No. 15. No black on primaries. Larus hyperboreus. Glaucous Gull. See No. 13. Subfamily STERNIN^. Terns. Upper mandible, nearly straight, not hooked or decidedly rounded near tip; nostrils, in basal half of bill; outer tail feathers, usually longer than middle feathers; toes, four; front toes, webbed; hind toe, small, but well Common Tern. *GROUP 1. Wing, to inches long. Forehead, white; bill, black; under parts, white; back, pearl gray; crown, black (adult in summer); back and crown, mottled (im- mature). Sterna antillarum. Least Tern. *For directions for measurement, see page 21. 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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Keywords: ., bookauthorcory, bookcentury1900, bookdecade1900, booksubjectbirds
