PERIPHERAL BIRDS 



A peripheral species or subspecies is one whose occurrence in the United States is at 

 the edge of its natural range and which is threatened with extinction within the United 

 States although not in its range as a whole . Special attention is necessary to assure 

 retention in our Nation's fauna. 



Harcourt's Petrel, Oceanodroma castro 



Breeds in the Pacific on Hawaiian Islands (Kauai and possibly other high islands), 

 the Galapagos Islands and possibly Cocos Island; in the Atlantic from the Azores 

 to Ascension Island and St . Helena . Endangered in Hawaii . 



Green-throated Arctic Loon, Gavia arctica viridigularis 



Breeds from Cape Prince of Wales, Alaska, west to Khatanga River, Kamchatka and 

 Sakhalin Island, U.S.S.R. Winters south to Baltic Sea and Japan. 



Northeastern Least Grebe , Podiceps dominicus brachypterus 

 Resident from southern Texas south to Panama . 



Red-Billed Tropicbird, Phaethon aethereus mesonauta 



Breeds off both coasts of Middle America, northern South America and the 

 Caribbean Islands . Rarely in Puerto Rico . 



Atlantic Blue-Faced Booby, Sula dactylatra dactylatra 



Bahamas and West Indies including Puerto Rico and the Virgin Islands , to 

 northeastern coast of South America, Fernando de Noronha and South Trinidad. 



Red-Faced Cormorant, Phalacrocorax urile 



Breeds from Pribilof Islands and Aleutian Islands west to Komandorskie Islands 

 and Siberia, U.S.S.R. Winters from Pribilof and Aleutian Islands south to Japan. 



Eastern Reddish Egret, Dichromanassa r. rufescens 



Breeds along Texas coast and in Florida Keys south to Hispaniola. Winters from 

 southern Texas south to Venezuela. 



Roseate Spoonbill , Ajaia ajaja 



Breeds and winters from coastal Texas, Louisiana, and southern Florida south to 

 central Argentina. 



West Indian Tree Duck, Dendracygna arborea 



Resident in West Indies. Rare in Puerto Rico and Virgin Islands. 



White-Cheeked Pintail (Bahama duck). Anas bahamensis 



Resident in the West Indies. Rare in Puerto Rico and Virgin Islands. 



Northern Black-Bellied Tree Duck, Dendrocygna autumnalis fulgens 



Breeds from southeastern Arizona and Gulf coast of Texas south to Panama. 

 Winters from Mexico south to Panama . 



Masked Duck, Oxyura dominica 



Resident in Mexico south to Argentina, casual in South Texas; rare in Puerto Rico. 



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