SYNOPSIS OF ORDERS AND FAMILIES. 
LOON. 
Family 2.. LOONS. GAVIIDA. 
Toes four, webbed; toe-nails not broad and flat; tail present. 
Family 3. AUKS, MURRES, AND PUFFINS. ALCIDA. 
Toes three, webbed; toe-nails sharp; tail present. 
ORDER II. GuLLs, TERNS, JAEGERS, Etc. LONGIPENNES. 
(3 families, 42 species, 1 subspecies.) 
f 
Birds generally seen on the wing, as arule, 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 long, the outer 
feathers much the longest; tail usually short and square in the Gulls, 
long and forked in the Terns; toes webbed. Color usually pearly gray 
above, white below in adult Gull and Terns; Jaegers and many young 
Gulls are dark. 
oom, 
PARASITIC JAEGER. 
Family 4. SKUAS AND JAEGERS. STERCORARIIDE. ; 
Toes four; three front ones webbed; bill with swollen, hooked tip, its base with a 
scaly shield. 
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