“Trailing edge asymmetric serrations”
Interesting concept.
Birds have very soft flexible wing surfaces.
Application to aircraft? Not sure.
I think composite structures have different resonances than conventional aluminum and alloy wings.
Actually a lot of birds, if you can see their wing surfaces and feel them, they aren’t what you would call “soft” - they are brittle-feeling and stiff, like an airplane wing.
One thing I’ve noted with owls in flight is that they are very quiet and can turn on a dime. Some of them aren’t as “fluttery” as the ones in the woods here - these tend to be of the “screech owl” type. Big owls like barn owls are built more like large raptors and their feathers and wings are stiffer.
It isn’t the wing but the feather...owl feathers are fringed.
One of the best aviation applications is to the trailing edges of stealth helicopter rotors. You probably won’t see much documentation on this.