Possible Clues:

• Birds, for example rest in flight
• Birds in Albert Square he picks up without resistance
• Birds, say, disturbed rest
• Wading birds like others, twitching tail
• Flyers, for example, and engineers regularly failing in test
• Some plume suppliers
• Everglades natives with long legs
• Florida waders
• Wetland birds
• Fliers, for example, and engineers test regularly