Related Clues:

• Birds that sound batty
• Some diving birds
• Birds on Canadian dollars
• "On Golden Pond" birds
• Web-footed birds
• Nutcases
• Fiends
• Crazies
• Fanatics
• Goofballs
• Crackpots
• Whack jobs
• 'Crazy' birds
• Canada coin birds
• Crazy birds