20 THE BIRDS OF NEW JERSEY. 



these birds, however, are abundant at this time, and 

 seem to pass through quickly. The majority of these 

 August warblers that have been collected seem to be old 

 birds, while the large majority of those which pass 

 through later are, as is generally known, birds of the 

 year. 



The bulk of the Warblers, Vireos, Tanagers and the 

 Thrushes, whicli characterize the May migration in the 

 spring, pass through in the fall from September 10 to 

 October 1, and by the end of the first week of the latter 

 month nearly all the stragglers have disappeared. 



The October birds correspond in general to those of the 

 April migration, occurring, of course, in. inverse or- 

 der, and by November 1 only a few Hermit Thrushes, 

 Fox Sparrows, Field Sparrows and Myrtle Warblers are 

 left of the migrating birds, while all the winter visitants 

 have arrived in force. 



The Snowbirds begin to arrive as early as September 27, 

 though the}^ are not common before the middle of Octo- 

 ber. The first White-throated Sparrows are seen about 

 September 20, while on the coast the Herring Gulls arrive 

 at Atlantic City about October 1. 



Such is a brief outline of the spring and fall migrations 

 in the vicinity of Philadelphia. 



Birds may be arranged in two groups, according to 

 their manner of migration, viz., day migrants and night 

 migrants. The former include the Doves, Hawks, Hum- 

 mingbirds, Chimney Swift, Nighthawk, Horned Lark, 

 Crows, Jays, Grackles, Blackbirds, Swallows, Cedarbird, 

 Titlark, Bluebird and Robin, and perhaps a few others. 



The night migrants include the Woodpeckers, Cuckoos, 

 Flycatchers (except the Kingbird), Meadowlark, Orioles, 

 most of the Finches, the Vireos, Tanagers, Warblers, 

 Wrens, Creepers, Nuthatches, Titmice and most of the 

 Thrushes. 



