I was strolling across the Great Lawn to see the owl when I heard four screams over my head, blood curdling screams, looked up, shot images without thinking. This was a very different sound, murderous screams. Only when I got images into computer could I see that this was a kestral. I'm sure it caught a red bat. Scared bat to death? Screamed a victory call? I don't know, but it was chilling.
After that I was ready for peace and quiet.