"Better be a wood-bird than a cage-bird, you know," the old man whispered.
The cage-bird class has as its most important representative the canary.
Pothinus finally discovered that he was having some difficulty in keeping his cage-bird contented.
Miss Beale, rushing across London in a taxi, reminded him of nothing more masterful than a cage-bird turned loose in a tempest.
Lean on the wall, and loose her cage-bird heart, To lift and breast and dance upon the breeze.