Claribel could fly gracefully in the space station, performing loops in the air.
True. Claribel adapted remarkably well to zero gravity and could fly gracefully in the space station. The story describes her performing 'a curious kind of backward loop' that no earthbound canary had ever managed, and she moved with 'leisurely flicks' having learned to operate efficiently without unnecessary work.
Explanation
The narrator describes seeing Claribel 'hanging in the air as motionless as a hummingbird' and performing 'a curious kind of backward loop I'm sure no earthbound canary had ever managed.' She had 'already learned how to operate in the absence of gravity, and did not believe in doing unnecessary work,' demonstrating graceful and efficient movement in the space station.