Possible Clues:

• Common hooting bird
• Nocturnal bird with brownish-gray feathers
• Want to fly with a shrill cry? This bird will do
• Somewhat rusty member of parliament?
• Former name for an assistant Brownie Guider
• Deputy Brownie guider
• In trouble - want to send out distress signal - here's a hooter
• Bird of prey, Strix aluco
• Reddish-brown European bird with a round head