Synopsis of Orders and Families- 



loon. 



Family 2. LOONS. GaVIID^. 



Tues four, webbed; toe-nails not broad and flat; tail present. 

 Family 3. AUKS, MURRES, AND PUFFINS. ALCID^. 

 Toes three, webbed; toe-nails sharp; tail present. 



Order II. Gulls, Terns, Jaegers, EtC. LONGIPENNES. 



(3 families, 42 species, 1 subspecies.) 



Birds generally seen on the wing, as a lule, over water. Bill strong, 

 thick; hooked in the Gulls and Jaegers; sharply pointed in the 

 Terns; often colored in part yellow or red; wings very Jong, the outer 

 feathers much the longest; tail usually short and square in the Gulls, 

 long an:1 forked in the Terns; toes webbed. Color usually pearly gray 

 above, white below in adult Gull and Terns; Jaegers and many young 

 liulls are dark. 



PARASITIC JAEGER. 



Family 4. SKUAS AND JARGERS. STERCORARIIDyE. 



Toes four; three front ones webbed; bill with swollen, hooked tip, its base with a 

 jcaly shidd. 



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