A Vulture Census 



8] 



while in the case of the Turkey Vulture there were but 21 

 blank days ; one only on 148 days, and on six days but two 

 were seen daily. 



Table indicating- the total of monthly enumerations for the 

 three years arranged in numerical sequence: 



Black Vulture Turkey Vulture 



57 162 255 45 73 104 



61 165 259 55 73 108 



103 176 260 60 77 110 



104 187 273 60 77 115 

 114 189 304 62 84 119 



122 202 316 52 86 151 



123 203 325 63 86 158 

 132 214 375 66 86 189 

 132 215 378 66 95 206 

 136 215 408 66 100 427 

 156 226 530 71 101 497 

 156 249 771 71 103 766 



Which gives the following summary: 



Black Vulture Turkey Vulture 



Under 100 birds seen during 2 months 21 months 



100 to 199 15 months 11 months 



200 to 299 11 months 1 month 



300 to 399 5 months months 



400 to 499 1 month 2 months 



500 to 699 1 month months 



700 to 799 1 month 1 month 



So that we find 61 per cent of the months show less than 

 100 Turkey Vultures seen monthly, and only 5^^ per cent of 

 the months show 100 Black Vultures seen monthly. 



During the period of three years there are but eight days 

 when no Vultures were seen, and as with but one exception 

 such occurrences were on extremely hot or very stormy 

 weather it may have been due to lack of observation rather 

 than absence of the birds. 



From September 23, 1917, to October 5, 1917,* inclusive, 

 was spent at our lighthouse, eight miles down the river and 

 located on a barren spit of the mainland. 



During that time the total of Turkey Vultures seen was 



* In the table of general enumeration, in order that each month 

 should show complete, an average for the days of actual count at 

 St. Marks during September and October, 1917, was made and 

 added for the days during my absence at the lighthouse. 



