Possible Clues:

• Laughing jackass
• Large Australasian kingfisher
• Australian kingfisher
• Bird that appears on the Australian $20 banknote
• A winger Australians consider laughable?
• Bird identified by man who explored a town, say
• Back-to-back defeats in a couple of cups upset rugby winger in Australia
• American character, a hard worker claiming (wrongly) I'm louder, turns straight round
• Australian bird
• Nut, a seed that can stick on a bird