I know that pheasants need brush and stuff. I was going to do four o clocks. They grow back year after year, get big and provide shade and cover, BUT when I researched, they are toxic to birds, BIG NONO NO FOUR O CLOCKS! Sooooo.... I could get some small trees from the wood lines, maybe even a few hollys. I was also thinking Impatiens. They aren't toxic and grow well here. Any opinions on what I should get. I would just get stuff from our woods, but since I can't identify it all, I'm a bit worried. I was thinking of grabbing some small sweet gum trees, and maybe get some of the groundcover to grow in there. I am open to suggestions. The pen is 20x20.