This year while looking for signs of life around the Hakonachloa grass, we discovered that a set of solitary bees has found the area enticing. Pictured is one of the holes they made. There are about 8 in all. I know they are bees not ants because I've watched them go in and out. Tried to get that in a picture but they wouldn't cooperate.
I'm a bee person so this discovery is exciting for me!