There is a lot of cover that will not hold up to ice and heavy snow, after the first blast they are down and out. Not prairie grass and some of the legumes.
Here is a patch in the Clubhouse Field the morning after last weeks heavy snow.
The same spot the next afternoon, most of it is back up and still excellent cover.
Partridge Pea patches are a savior for birds on snowy and icy days. Check out how it is still standing up, holding all the snow leaving a nice hiding spot for birds along with plenty of seeds to gobble up.