. The birds of eastern North America known to occur east of the nineteenth meridian .. . Great Hlack backed Gull. Kinir liillcil (Mill. Back, pale jn-arl color: iiriniarif?marked with slaty gray. Liiriis kxmlieni. Kumiiens ( No. 2(;. \ \ HiMThi;. (iull. 40 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. Section 4. Length, over 21; bill, under 2; underparts, not white. Outer webs of priniaries, dark 1)rowii; bill, over (immature). Laritx ar(irnt.(ttns siiiithsoninmis. American Herring Gull. See No. 30. Outer \vel)s of primaries, brownish; bill, under (immature). Lams knmlieni. Kuml
. The birds of eastern North America known to occur east of the nineteenth meridian .. . Great Hlack backed Gull. Kinir liillcil (Mill. Back, pale jn-arl color: iiriniarif?marked with slaty gray. Liiriis kxmlieni. Kumiiens ( No. 2(;. \ \ HiMThi;. (iull. 40 KEY TO THE BIRDS OF EASTERN NORTH AMERICA. Section 4. Length, over 21; bill, under 2; underparts, not white. Outer webs of priniaries, dark 1)rowii; bill, over (immature). Laritx ar(irnt.(ttns siiiithsoninmis. American Herring Gull. See No. 30. Outer \vel)s of primaries, brownish; bill, under (immature). Lams knmlieni. Kumliens Gull. See No. 26. Outer we1>s of i)rimaries, asli color (innnature). Larvs Irneopterns. Iceland Gull. See No. 25. Section 5. Length, under 21. A band of blaek on the bill (adult). 15111, didl yellow, tipped with black (immature). Lams delawarrnsis. Ring=billed No. Tcrnb. Gulls. -X- Group 5. Wing, over 17 inches long. Primaries, m:irk(>d with moi-(! or less black. Lams marinns. Great Black=backed Gull. See No. 27. No bliKk on primaries. Lams {/Jaiims. Glaucous Gull. See No. 24. * For diiictions for measurement, see page 9. FAMILY GULLS AND TERNS. 41
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Keywords: ., bo, bookcentury1800, bookdecade1890, booksubjectbirdsnorthamerica
