Tawny Owls are still very vocal

Tawny Owls are still very vocal. Around dusk they usually wake up and start calling to their family, these are really wonderful calls, not just the Toowhit Toohoo, but a wide range of quieter more plaintive and slightly squeaky calls some sounding to me like those party whistles that uncoil as you blow into them. Occasionally they seem to be fighting making some strange almost growling sounds, you really need to know what you are listening to to believe it.