1 40 Kopman, Birds of Jefferson Parish, La. \_kat 



of the Mississippi and La Plata, and to a lesser extent the rivers 

 of the Guianas and the northeastern tributaries of the Amazons, 

 the birds are guided largely by their direction, and the courses of 

 the streams ; but it seems as if outside of these areas, we must 

 look for the key to the course of their flight in the direction of the 

 winds, as by no other method can we satisfactorily explain (1) 

 why they pass over the West Indies always from northwest to 

 southeast, (2) why they are usually observed to migrate with a 

 'beam ' wind, (3) why they never alight on Barbados or the other 

 West Indies if the wind is northeast, but only if it comes from the 

 southeast or some other direction, not necessarily contrary to 

 their course, (4) why they appear on the Massachusetts coast 

 during northeast winds, but leave if the wind changes to the 

 southwest or west, and (5) why they reach the South American 

 continent in the Guianas on their journey south, but leave it 

 at the isthmus of Panama in coming north. 



LIST OF BIRDS SEEN IN JEFFERSON PARISH, 

 LOUISIANA, APRIL i, 1904. 



BY H. H. KOPMAN. 



The following list of 64 species seen by the writer and two 

 companions, Messrs. Andrew and W. B. Allison, during an ex- 

 tended walk near New Orleans, April 1, 1904, presents the typi- 

 cal bird-life of the section at that season with an unusual degree 

 of closeness to what might be considered the ideal typical state of 

 the avifauna. The season was absolutely normal, no extremes of 

 cold having occurred during the winter, and the spring having 

 developed slowly but practically uniformly from small beginnings 

 after the first week in January, and more rapidly and without the 

 slightest interruption from the cold, after the 20th of February. 



Because the list gives a typical view of our bird-life at the 

 season in question, and because it is the largest Louisiana list of 



