1 86 BIRDS IN THE DISTRICT OF COLUMBIA. 



265 Ruddy Duck 



266. Cauada Goose 



267. Brant 



268. Whistliug Swau 



269. American White Pelican. 



270. Doutole-crested Cormo- ) 



rant ) 



271. Audubon's Shearwater.. 



272. Leach's Petrel 



273. Hawaiian Petrel 



274. Wilson's Petrel 



275. Black Skimmer 



276. American Herring Gull. . 



277. Ring-billed Gull ... 



278. Laughing Gull 



279. Bonaparte's Gull . . . 



280. Gull-billed Tern .... 



281. Caspian Tern 



282. Forster's Tern 



283 Common Tern 



284. Least Tern 



285. Black Tern 



286. Briinnich's Murre.. 



287. Loon 



288. Red-throated Loon.. 



289. Holboell's Grebe 



290. Horned Grebe 



291. Pied-billed Grebe... 



Sept. to April. 



j Oct. to probably 



/ April. 



Oct. to March or April. 



( Casual in spring and 



I autumn. 

 April; July; prob- 

 ably also in au- 

 tumn. 



\ Two or three in- 



'/ stances. 



Several instances. 



^ T wo specimens (hur- 



^ ricane of Aug. 29, 



{ 1893.) 



I One instance, many 



•< vears ago (about 



{ i859.) 



S One instance, long 



"/ ago (Sept. 8, 1858.) 



Oct. to March. 



j Oct. to Nov. and Feb. 



I to early April. 



I In Sept. Very few 



) records. 



j Oct. to Nov. and 



I March to May. 



^ Late summer and 

 early autumn. No 



\ recent records. 

 In one instance, after 

 hurricane of Sept. 

 29, 1896. 



\ In late summer or 



1 early autumn. 



Spring and autumn. 



Spring and autumn. 



f Common in early au- 

 J tumu (Aug. and 



j Sept.) Rare or 



l^ wanting in spring. 



( Several speci mens 



\ late in Dec, 1896. No 



( other records here. 



^ Sept. to April. Less 

 common in mid- 



/ winter. 

 Very few records ; all 

 in late autumn or 

 early winter. 

 Sept. to Nov. Possi- 

 bly through winter 

 to April. 



Oct. to May \ Less 



> common in 

 Aug. to May ) mid-winter 



* Rare at this season. 



