VoI i907" IV ] Kopman, Hi h I Distribution. 175 



catcher, R; Wood Thrush; Bluebird, Et (local and never very 

 common). 



As the writer has discussed the subject of migration in Louisiana 

 at some length in other papers appearing in "The Auk,' he will 

 merely restate in general terms what has appeared there, and then 

 illustrate with several concrete instances. The substance of tins 

 matter is that purely transient species are rare in spring in the 

 delta region, but much commoner in fall. The presence of such 

 forms is limited largely to the latter part of spring, and even then 

 occurs with more or less rarity and irregularity. There arc rarely 

 more than two or three days of comprehensive migrational activity 

 between March 15 and April 15. In making many spring expedi- 

 tions in the vicinity of New Orleans the writer has found it the rule 

 that between the dates mentioned, only resident, summer visitor 

 and lingering winter visitor species will be observed. On one <>! 

 the seemingly most favorable days I have ever been afield in south- 

 ern Louisiana, April G, 1895, the only exclusively transient species 

 I made certain of seeing were the Ovenbird and the Water-thrush 1 

 The day was warm and showery, with soft south winds, and 

 seemed to supply exceedingly favorable conditions for migration; 

 the weather was essentially spring-like, of the kind that gives the 

 greatest impetus to the full development of all vernal resources, 

 yet in no wise summery. All the familiar birds were present in 

 great numbers; many, in fact, seemed just to have arrived, and the 

 probability was that there were many transient individuals among 

 those observed; but the fact remained that only a very slightly 

 different element was added to the settled avifauna of the season. 

 Viewed as an example of summer bird-life, however, the species 

 observed were of prime significance. The songs of White-eyed 

 Vireos, Prothonotary, Parula, Hooded, and Kentucky Warblers 

 mingled incessantly; the notes of the Red-eyed Vireo and Syca- 

 more Warbler were somewhat less obtrusive. These species, with 

 the possible exception of the Sycamore Warbler, greatly outnum- 

 bered all other forms in the description of country first traversed, 

 the normal moist woodland of the lowlands; but on reaching a 

 tract of slightly higher and more varied woodland, with more 

 undergrowth, we found Crested Flycatchers, Catbirds, and Brown 

 Thrashers, while Summer Tanagers and Wood Thrushes were 



