Related Clues:

• Digs with twigs?
• Homes in the woods
• Some tree houses
• They may be feathered
• Homes for those living in the sticks?
• Twig-and-mud homes
• Roosts
• Bird berths
• Some egg containers
• Fits like matryoshka dolls
• Bird abodes
• Aeries
• Conical quarters
• Cheep accommodations?
• Termitaria, e.g.