. The birds of eastern North America known to occur east of the nineteenth meridian .. . ck, moreor lt!ss marked with white. Larus artjcriiatiis sinilhsnnianus. American Herring QuII. See No. 30. * For dhectious for measurement, see page 9. LARIT)^. GULLS AND TERNS. 39 Section 2. Length, over 21 ; bill, over 2; underparts, not white. Outer \vtl)s of , usli color (imniiiturt;). Larnn glaums. Glaucous Gull. See Xo. 24. Outer webs of primnries, dark l)i-owii; wiug, over ; deptli of liill at ani^Ie, over .UO(immature). Lams marimis. Great Black-backed Gull. See No. 27. Oute
. The birds of eastern North America known to occur east of the nineteenth meridian .. . ck, moreor lt!ss marked with white. Larus artjcriiatiis sinilhsnnianus. American Herring QuII. See No. 30. * For dhectious for measurement, see page 9. LARIT)^. GULLS AND TERNS. 39 Section 2. Length, over 21 ; bill, over 2; underparts, not white. Outer \vtl)s of , usli color (imniiiturt;). Larnn glaums. Glaucous Gull. See Xo. 24. Outer webs of primnries, dark l)i-owii; wiug, over ; deptli of liill at ani^Ie, over .UO(immature). Lams marimis. Great Black-backed Gull. See No. 27. Outer webs of prhuaries, dark browu; depth of bill at augle, under .ItO; wiug, under )0(iunnature). Lams argoitatus smithsonianus. American Herring Gull. See No. ;{0. Section 3. Length, over 21 ; bill, under 2; underparts, white. Hack, grayish 1)1 u», uiort^ ov less black on primaries. Lams argfutatus smithsoiua)ii(s. American Herring Gull. See No. .{0. IJaek, pale pearl color; pri-maries, whitish or pearl color,shadiug to white at tips. Lams No. 25. I»V. ■X, X Kiiig-billcil (iull. Great Black backed Gull.
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1900
