80 The Wilson Bulletin — No. 104 



\'ultures were seen, and for same period but 21 blank days 

 for the Turkey Vultures, while the daily maximum number 

 of each month was 20 or more for 25 months of the 36 

 months under consideration for the Black Vultures, and only 

 six months for the Turkey Vultures, thus indicating, as the 

 daily records show, a much greater variability in the occur- 

 rence of C. iirnhu. 



It is to be noted that while the yearly totals of Turkey \'ul- 

 tures are considerably below those of the Black Vultures the 

 greatest number seen for any single day, covered by the 

 whole record, was the 163 Turkey Vultures on November 7. 

 1915. This fact taken alone might lead to the conclusion 

 that this species must be more numerous in our vicinity than 

 is the Black Vulture, but as the daily records show a great 

 excess of both species from October 14 to November 21, 1915, 

 due to an unusual amount of available food, it seems reason- 

 able to believe that birds of both kinds were attracted from 

 afar. 



The following table indicates the aggregate of daily min- 

 imiims — 0, 1, 2 — for the three years, August, 1915, to July, 

 1918, inclusive. In no month for the entire period did the 

 daily minimum exceed 2 : 



Black Vulture Turkey Vulture 



12 12 



August 19 5 



September 6 11 1 13 



October 1 12 12 2 



November 3 1 1 1 4 



December 10 3 5 



January 10 9 3 15 



February 9 6 17 4 



March 4 7 13 



April 14 19 



May 18 24 



June 8 6 



July 5 2 2 26 



Totals 75 80 1 21 148 6 



These totals indicating that in the case of the Black Vul- 

 ture on 75 days of the three years none was seen ; on 80 days 

 but one was seen daily, and on one day but two were noted, 



