Thank you, Nannytopsy. That’s useful to know. My dd has rooks nesting in some old oak trees near her house. They don’t half make a noise on summer mornings, starting their racket at about 3:30am and waking her children. If it’s not the rooks, it’s owls sitting on the roof calling to each other. 
Kookaburras look quite comical, Nanna8, sort of avian scarecrows!
BBC 4 Extra To Be Wound Up Next Spring


