Debris on Deer Antlers

I found this young buck whitetail deer at dawn last week and couldn't identify the debris stuck on his antlers.  It most closely resembles a type of packaging material with long, dense, grass-like strands.
I wouldn't have spent time getting photos of this young deer were it not for the unusual debris.  It is an interesting pose, though, as the rut was in progress and he was looking for does.  His neck is outstretched as he sniffs the air.  The soft backlight shines through the trash on the antlers.  It appears as though there is fog in the background but actually it is tall grass in the field that is out of focus.  The deer was breathing heavily and since the morning was quite cold his breath is faintly visible.  Too bad it blends in with the blurry grass.
400mm lens, 1/800 second at f/2.8, ISO 1250.