Raven
A raven was a bird native to Earth, a member of the Corvidae family. It featured black feathers, a wingspan of approximately one half meter, yellow eyes and a powerful, triangular beak. ()

When Data was experiencing his first dreams in 2369, images of ravens played an important role in his visions. In order to explore the images in a creative way, as Captain Picard suggested, Data created a number of paintings depicting ravens. Data's creator, Doctor Noonian Soong, later appeared in Data's dreams and explained that Data was the bird. ()

In 2372, during a security drill on Deep Space 9, Odo morphed into a raven in order to escape his pursuers. ()

In 2374, Seven of Nine began experiencing flashbacks that included a raven, caused by proximity to a Borg resonance frequency. She described her reaction as follows:
"When it looks at me, I am paralyzed. I cannot move. It seems to know me, but I don't understand how that's possible. It's merely a bird, an inferior form of life, but the sight of it fills me with fear."

The  crew later found that the bird represented the , the starship where Annika Hansen had spent most of her youth. ()

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de:Rabe
Earth animals
Avians