List of Birds Found Withix Fjftv Miles of the American 

 Museum of Natural History, Xew York City/ 



Order PYGOPODES. Diving Birds. 

 Family COLYM'BID.^. Grebes. 



Holboell's Grebe {Colymbus Holbcclli). A rather uncommon spring and 

 fall migrant and less common winter resident. 



Horned Grebe {Colymbus atiritiis). A common spring and fall migrant 

 and not imcommon winter resident. 



*Pied-billed Grebe; Diedapper ; Dabchick ; Hell Diver (Podilymbus 

 f'odiccf^s). Occurs chiefly as a migrant. In northern New Jersey and the 

 Lower Hudson Valley it is common, Init on Long Island is of "comparatively 

 rare and infrequent occurrence'" (Dutcher, MS). During favorable seasons 

 a few pass the winter here. I know of no definite instance of its breeding. 

 (See group, second floor of Museum). 



F.xMiLY GAVIID.F:. Looxs. 

 Loon (Gaz'ia iiiihcr). A common migrant and less common winter resi- 

 dent. (See group, second floor). 



Fig. I. Loon. 



Black-throated Loon [Gavia arctica). Breeds in the far north, migrat- 

 ing southward to southern Canada. The only record of its occurrence near 

 New York is based on an adult male ( Coll. Am. Mus. No. 64,610) taken April 

 29, 1893, between Sands Point and Execution Lighthouse, L. L (Dutcher, Auk, 

 X, 1893, p. 265). 



Red-throated Loon (Gai'ia liiiinuc). A not imcommon winter resident, 

 but more frequently found during the migrations. 



1 Issued also in separat; form as Guide Leaflet, No. 22. 



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