Related Clues:

• Enclosure originally approached by way of track
• A change one introduced — it has some flapping
• Where flights are limited start to advance by railway
• Bird sanctuary by a Roman road beside a railway
• Large enclosure for keeping birds
• I vary a design for a cage
• Albatross initially going by railway, in large birdcage
• A change incorporating single flier's home
• Bird-house
• Enclosed area where birds are kept
• A seesaw covering middle of big bird cage
• Area against airy building designed for high-flyers
• Bird collection
• Birds roost here through sitting under a railway
• Monkey house : monkeys :: ___ : birds