Bison triggered Avalanche in YNP?

Out of Advisory Area
Code
SS-AW
Latitude
44.92680
Longitude
-110.45100
Notes
From an email:
Upper Elk Creek, E. aspect, 8,200 ft
Debris looked pretty fresh, Who knows, but could have been triggered either directly or remotely by bison. The disturbance to lookers left (at bench) is due to bison - they are not cryptic animals!
Number of slides
1
Number caught
0
Number buried
0
Avalanche Type
Soft slab avalanche
Trigger
Wildlife
Slab Thickness units
centimeters
Single / Multiple / Red Flag
Single Avalanche
Advisory Year