A fenza bird was an avian lifeform with red plumage native to the planet Trill. In 2376, a still image of a fenza bird in flight alerted Ezri Dax and General Taulin Cyl that the supposed live video feed they were watching was in fact paused, giving the impression that nothing was wrong. (DS9 - Worlds of DS9 novel: Trill: Unjoined)