A Tarkalean hawk is an animal lifeform, a type of hawk-like bird native to the planet Tarkalea.
A Tarkalean hawk was the first form Odo took when regaining his shapeshifting abilities after linking with a dying infant Changeling. (DS9 episode: "The Begotten")
Tarkalean hawks are noted for their sharp and unwavering eyesight. (TNG - Slings and Arrows eBook: The Insolence of Office)