The Oologist. 



Vol. XXIV. No. 10. 



Albion, N. Y. Oct., 1S07. 



Whole No. 243 



THE OOLOGIST, 



A Monthly Publication Deroted to 



OOLOGY, ORNITHOLOGY AND TAXI- 

 DERMY. 



FRANK H. LATTIN, Publisher, 



ALBION, N. Y. 



EBHEST H. SHORT, Editor and Manager. 



Correspondence and items of interest to the 

 student of Birds, their Nests and Eggs, solicited 

 from all. 



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AUTUMN WARBLER MIGRATION. 

 Extracts From a Reprint of an Arti- 

 cle in the "Auk" for July, '07, by 

 Permission of the Author. 



BY J. CLAIRE WOOD. 



In 'The Auk,* Vol. XXIII, No. 1, 



January, 1906, I gave an account of 

 the Warblers noted here in the au- 

 tumn of 1905. That season I devoted 

 my entire spare time to them from 

 August 20 but this autumn I did not 

 start until September 3; consequent- 

 ly, the following list is inaccurate as 

 to first arrivals but I doubt if any- 

 thing escaped notice from September 

 3 to the end of the season. A Mourn- 

 ing ( Geothlypis Philadelphia) and sev- 

 eral Nashville Warblers were seen in 

 1904 but were absent in 1905, while 

 the Tennessee was absent in the for- 

 mer season and common in the lat- 

 ter. This irregularity in warbler mi- 

 gration was interesting, and I wished 

 to learn what percentage of the spe- 

 cies were subject to it and also to es- 

 tablish a better knowledge of the rela- 

 tive abundance and time of departure 

 by a comparison with the present 

 season of 1906. To get the most uni- 

 form results I hunted over the same 

 territory, with the exception of one or 

 two days and the comparison was 

 satisfactory until displaced by an ab- 

 normal change in temperature. Dur- 

 ing the night of October 9 the mer- 

 cury dropped to 33 degrees, and we 

 had a genuine heavy snow storm on 

 the 10th, but the snow melted as it 

 fell. Toward evening the mercury be- 

 gan to drop and reached 25 degrees 

 at 3 a. m. on the 11th where it re- 

 mained for three hours. This killed 

 all plant life, susceptible to frost, and 

 its blighting influence was noticeable 

 throughout the woods on the 14th; 

 even the live oak leaves were affected, 

 while beeches were a mass of yellow 

 and no longer yielded a food supply 

 to the warblers. With the exception 



