The 20-year-old singer moved into a house in Nashville this summer, and insisted on the "person-sized" birdhouse, which is suspended over her pond in her living room and is her favourite place to snack and catch up on television shows.
She said: "It's just fun having the cage."
The 'Love Story' hitmaker turns 21 - the legal age of alcohol consumption in the US - in December but admits she won't be getting intoxicated as she is afraid of upsetting someone when drunk.
She said: "I don't drink because I don't really feel like it. It's not like I judge people who do or that I don't hang out with people who drink, I just don't really feel like it.
"I think the reason I haven't experimented with drinking is that I don't like to feel like I might say something that could hurt somebody's feelings. Or I might come off in a way I can't control."
