. The birds of eastern North America : known to occur east of the ninetieth meridian. Birds -- North America. FAMILY LARID^E. GULLS AND TERNS. 39 Section 2. Length, over 21; bill, over 2; underparts, not white. Outer webs of primaries, ash color (immature). Outer webs of primaries, dark brown; wiug, over ; depth of bill at angle, over .HO Lnrnx tjlaucus. Glaucous Gull. See No. 24. (immature). Larus mariii us. Great Black-backed Gull. See No. 27. Outer webs of primaries, dark brown; depth of bill at angle, under .90; wiug, under (immature). Larus argentatus smithsonianus. American He
. The birds of eastern North America : known to occur east of the ninetieth meridian. Birds -- North America. FAMILY LARID^E. GULLS AND TERNS. 39 Section 2. Length, over 21; bill, over 2; underparts, not white. Outer webs of primaries, ash color (immature). Outer webs of primaries, dark brown; wiug, over ; depth of bill at angle, over .HO Lnrnx tjlaucus. Glaucous Gull. See No. 24. (immature). Larus mariii us. Great Black-backed Gull. See No. 27. Outer webs of primaries, dark brown; depth of bill at angle, under .90; wiug, under (immature). Larus argentatus smithsonianus. American Herring Gull. See No. 30. Section 3. Length, over 21 ; bill, under 2; underparts, white. Back, grayish blue, more or less black on primaries. Larus ar<intntus smithsonianus. American Herring Gull. See No. 30. Back, pale pearl color; pri- maries, whitish or pearl color, shading to white at tips. Larus 'rus. Iceland Gull. See No. 25. Great Black backed Ring-billed Gull. Back, pale pearl color; primaries marked with slaty gray. Larus kumlieni. Kumlien's Gull. See No. 26. Herriii}? 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: ., bo, bookcentury1800, bookdecade1890, booksubjectbirdsnorthamerica
