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