E 

 o 



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to 



1000 



500 



100 



40 



30 



20 



10 







X X X X X 



X 



X 



<.l 



XXX 

 X X 

 X 



, ' , ', , 



JFMAMJJASOND 



month 



I =0.1-1.0 1=1.1-10 



MEAN NUMBER OF INDIVIDUALS OBSERVED PER HOUR 

 X = ZONE NOT SAMPLED IN THIS MONTH 



Figure 31. Seasonal abundance and seaward distribution patterns of the royal 

 terns in the northern Chesapeake Bight, 1971-1977. 



SANDWICH TERN (Sterna s andvicensi s) 



Statu s. --Rare breeding bird in coastal areas of Maryland and Virginia 

 (Weske et al . in press). 



Records.— 2, 9 km E Ocean City, 14 May 1972 (Rowlett 1973a). 



Remarks . — The sandwich tern usually forages over shallow coastal waters 

 off North Carolina where the species is common. Late summer occurrence of 

 post-breeding wanderers at the northern Chesapeake Bight is likely. 



CASPIAN TERN (S terna caspia ) 



Status . --Uncommon to fairly common spring and fall transient along coast, 

 rarely ranging offshore beyond sight of land; a rare breeding bird along the 

 Virginia coast (Weske et al. in press). 



Normal period of occurrence . --Mid-April to early November. 



Records . --5, 2-5 km E Ocean City, 19 October 1974. 



43 



