That's actually an excellent question, and I'm glad you asked it.
...I'm just not glad you asked it right *now*, because I need to get to bed and a proper anwer will take at least 30 minutes which I don't have at the moment. Can I give you a raincheck for now, and I'll get back to you on it later today?
Why, Yes you may!
You're the first person I've met that goes to bed even later than I do. (It was 6:49 a.m. MY time when you last wrote; for your sake I hope you live on the west coast... or maybe Hawaii!) I am very interested in hearing your answer about the birds.