Interesting behaviour of Feathered Thorns

This November there seemed to be a mass hatching of hundreds of Feathered Thorn moths about but this wasn't the most interesting thing I discovered.
Upon releasing a Feathered Thorn I had caught the night before, I noticed that the moth flew straight up into the air and then flew into a large mature beech tree and then suddenly fell in a tumbling motion that mimicked a falling autumn leaf all the way to the ground amongst the already fallen leaves. I only wish I had filmed it now!
I don't know if anyone else has noticed this before but it must be some kind of predator avoidance behaviour! It's amazing what you learn about nature when you look closely.

Feathered Thorn on my finger!