C. A. Bennett,       Asst. Supervisor        30                 1 
Gee. M. Palmer       Ranger                  3/11-3/21         10 
W. W. Ward                                    3/20-3/23         4 
W. E. Barnett          I                      3/14-5/20         7 
E. Halvorson         Adm. Guard              3/14-3/20          7 
S. Snyder                                    3/11-3/28         13 
H1. O'Brien                  "                3/4-42          18 
C. Oard                "                     3/17-/2          12 
F. Pottor            ER&                     3/20-3/24          4 
H. Cardwoll            i                     3/7-3/25          15 
0. Edwards           Jr. Biologist In Charge 3/12-4/3          20 
Total Man Days     ill 
Door Census Data 
All door soon during tho survey woeo rocky mountain mule 
door, odocoilous hoeonus macrotis.  The population estimates given 
are basod on the nmuibcr of door seon and the abundance of door sign, 
giving tme cosidor .tion to the typc of country covered, i. o., 
ground cover and topography, the rela-tivo amount covered, previous 
weather condit;'ions, ond visibility. .They are not based on an 
arbitrary corr otion figurL- mochanically applied to the total 
number of door so;on. Obviously tho estimotes can indicate only 
the approximate numbe-r of door a-d are therefore given in round 
numbers. Their prrirary function is to indicate population trends, 
and for this purpose they are reliable and of' value for wnrnopomcnt 
purposes. 
In like mannor the carrying capacities given are not basod 
upon a comprehensive study to determine the amount of forage per 
acre available and tho volume of browsc required to support a door. 
They represent estimrtes formed by the rrange investigator and 
while the actual numericcl figure is by itself of little value, the 
relation between this figure and the estimated population indicates 
the existing balance botvreon the amount of winter forage available 
cand the present populatioli.  Two carrying capacities are listed 
for the major wintering areas. One, the 1940 carrying capacity, 
indicates the approximate number of door that the winter range 
should carry to prevent further depletion during the coming vinter 
of 1939-40.   The other, thu potential carrying capacity, indicates 
the approximato number that could be carried vithout danger of 
range depletion if the bron-so species were pormitted to recover 
near maximum productivity. Carrying, capacity ostimatcs are Given 
only for the most importa:nt uits.