Got Something in my Bush....

Is that a crawl space under the window? you could be seeing a rodent deterrent on the job. I an going to guess it's a female and found a area to stay quite (thus the leaves she has cleared back) so she can leap at birds as they get on the trellis or the small tree.
This could be here favorite warm ambush area or she fought a snake there sunning again why the leave was cleared back.
My old home place I bought 27 years ago came with a cat that would not let me see her and stayed there well over 2 years and had 3 litters, a wild domestic cat is a great hunter and elusive. Time will tell Joe, it looks like you have a good start, don't be surprised if you see it jump up the tree or trellis. This is getting good :D