hope your headache goes away quickly.A couple of options would be to
1. Clip her wings. She may still get in the trees, but only if you have low branches. Unfortunately from those she can hop up and still get pretty high.
2. If you have a fenced run, keep them in the run for a week or two and re-train her to use the coop.
There are a lot of predators that will get them if they are in the trees. Opossums especially will get them at night.
RF - very interesting about the fire flies... but I can't imagine intentionally cutting them apart like Hollow mentioned... ewwww. The other night we were out late and when I went to put the chickens up it was already dark. Our wood line had the most beautiful lightshow in progress. I love fire flies. We don't have them in WA where I grew up.
NH - yeah, there are a lot of us with roos to get rid of! LOL. I am waiting for the weather to cool off before I take them to auction and waiting for some to grow out. I have seen Hollow's roos and if you want any of the breeds she has you really won't go wrong with hers. I am sure that Beth, CSB (I have some of her lavender am's), and RF also have great birds too! All of them are as biosecurity paranoid as I am so you will get nice healthy birds.
Luke, your dark brahma is nice!
Hope I didn't forget anyone... fighting a headache today.