Related Clues:

• Long-gone birds
• Boneheads
• Dim bulbs, so to speak
• Dim bulbs
• Bygone big birds
• Dimwits
• Extinct flightless birds
• Extinct birds of New Zealand
• Bygone New Zealand flock
• Old birds of New Zealand
• Extinct ostrich relatives
• Erstwhile egg-layers
• Extinct kiwi relatives
• Clumsy extinct birds
• Foolish folks