. Color key to North American birds . PARASITIC JAEGER. Family4. SKUAS AND JAEGERS. STERCORARIID^.Toes four; three front ones webbed; bill with swollen, hooked tip,scaly shield. 10 its base with a Synopsis of Orders and COMMON TERN. Family 5. GULLS AND TERNS. LARID/E. u^^ued- tiil Toes usually four, three front ones webbed; upper mandible curved and hooked taU usually square f Gulls, subfamily «^j. Bill straight and pomted; tail often forked (Terns, subfamily Stennmr).

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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbirds, bookyear1903