I bought a birdcage at the antique fair awhile ago, and while it looks pretty with nothing in it I'm always trying to think of something to display in there. Here's a couple of ideas I found:
1. Books {I also love the hat}
{here}2. Candles
{here}3. Flowers
4. Light bulbs
5. Real birds that match your decor.
6. Paper birds
{here: includes before/after shots}7. Fruit. Preferably fake fruit in a vintage cage, or real fruit in a new cage.
{here}8. Teacups
{here}My other ideas include love letters, paper butterflies, paper hearts, a string of tiny bunting (which is cute because bunting is also a type of bird... I know I'm a nerd), jewelry, moss/terrarium plants, hanging photographs (preferably Polaroids), and pom poms.
Which one do you like best? Any other ideas?