BIRDS OF EAST PENNSYLVANIA. 



Common Tern. 

 Arctic Tern. . 



Least Tern. . . . 



Black Tern. . . . 



Elack- Skimmer. . . 

 Great Northern Diver. 



Eed-throated Diver. 



Ked-necked Grebe. . 

 Great-crested Grebe. 

 Solavonian Grebe. . 



Pied-BiU Dobchick. . 



Sterna hirundo. Summer Gull. 

 Plentiful, arriving in the middle of 

 AprU. (S.) 



Sterna arctica. Eare. This species 

 appears to be most numerous in 

 Autumn, an occasional straggler only 

 being observed in Winter. It breeds 

 from New England northwards. (S.) 



Sterna frenata. Little Sheepshead 

 Gull. Common, arriving in May, 

 and departing in August. It is 

 rather larger than Ste7'na minuta 

 of Europe, and is otherwise 

 distinct. (S.) 



Sterna fissipes. Short-tailed Teen. 

 Not uncommon. It breeds in the 

 Western States, during which season 

 it is absent from the coast. (S. & A.) 



Rhynchops nigra. Shearwater. 

 Cutwater. Frequent, arriving in 

 the middle of May. (S.) 



Colymbus glacialis. LoON. Abun- 

 dant; and although it is more fre- 

 quent in Winter, many are found in 

 Summer during the breeding season. 



Colymbus septentrionalis. Rather 

 rare; the specimens procured being 

 mostly young birds. (W.) 



Podiceps ruhricollis. Earely met 

 with so far to the south. (W.) 



Podiceps cristatus. Dipper. Not 

 uncommon. (W.) 



Podiceps cornutus. HofiNED Grebe. 

 Water Witch. Hell Diver. 

 Frequent in Winter. A few remain 

 to breed. (W.) 



Podiceps Car-olinensis. DiPPEE. 



Carolina Grebe. Common, 



arriving eai-ly in April. (S.) 



