Related Clues:

• Twig-and-mud homes
• Roosts
• Bird berths
• Some egg containers
• Biblical vessels
• Symbols of safe passage
• Fits like matryoshka dolls
• Bird abodes
• Safe havens (Lat.)
• Aeries
• Cheep accommodations?
• Termitaria, e.g.
• Commodious vessels
• Shelters
• Slow-moving, commodious crafts