Just how do you mow that?
It's more of a pluck & clip thing, than mowing.
Kout Chur Widsi Owt is a refined art invented by the Japanese, many centuries ago.
Specialized tools are required, according to the size of the bird and the length of the grass.
One cannot expect to effectively remove ass grass with any ole' multi purpose pair of shears.
Some Japanese specialists will have as many as 100 Widsi shears, but a small portable kit, such as the one below, would usually suffice for average size birds, although hardly adequate for something as small as a Hummingbird, much less, something as big as a Manchurian Crane.