Related Clues:

• Extinct flightless birds
• They have no grace
• Big palookas
• Clumsy ones
• They're not too nimble
• Some extinct birds
• Gawky types
• Baryshnikovs they're not
• They're not too nimble and not too quick
• Clumsy sorts
• Schmoes
• Erstwhile egg-layers
• Churlish ones
• Maladroit types
• Numskulls