I agree. Your birds appear to be secure. A hawk will kill if given the chance. All of my pens are covered but I had used come zip ties and they deteriorated and there was a gap I wasn't aware of. I had some errands to one day and knew I would be gone for quite awhile. When I got home the birds were fussing unusual so I went to investigate. There was a Red Tail hawk in their pen and several bodies. My first thought was to get the hawk out. I was careful and carefully got the netting back enough at the far end of the pen to let the hawk out. Then I put the netting back up and retrieved the bodies. They were all pullets not far from starting to lay. A few birds died within the next couple of days from their injuries. I went in and this time put hog rings where the zip ties had been and went along all of the netting to make sure no more gaps and more hog rings.
Here are a few of the bodies I took out of the pen. I'm sure the birds were really freaked out and I felt so bad that I didn't notice the gap and protect them better. No more zip ties.