Honestly, I’m not sure. I’m assuming a hawk or strong on the wings? But I was under the impression if they were strong on the wings they would have taken off the first time out. They are all trap trained and have no issues coming in at feed time or at least the ones that stay. I got them a few weeks apart so half have gone out a few more times then the other half but I’m missing ones from the first half. They have seemed to have started routing for a few minutes at a time while the other half is still doing laps around the house/pecking around on the ground. I’m sure there isn’t anything I can do and I know losing birds comes with flying them in just hoping not to lose too many before I get any babies as well as not lose all of my favorite colors.