SYNOPSIS OF ORDERS AND FAMILIES. 



HERRING GULL. 



COMMON TERN. 



Family 5. GULLS AND TERNS. 



Toes usually four, three front ones webbed; upper mandible curved and hooked; tail 

 usually square (Gulls, subfamily Larin&). Bill straight and pointed; tail often forked 

 ('Terns, subfamily Sternince). 



BLACK SKIMMER. 

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