Tseetsk

The Tseetsk are a sentient race of avians native to the world they called Tseetsk-Home. (TNG novel: "Chains of Command")

Biology
In terms of anatomy, the Tseetsk appear remarkably similar to certain of Earth’s flightless birds. Doctor Crusher theorized that the Tseetsk started out as shore-dwelling, swimming birds. The average Tseetsk outwardly and comically resembles a chicken. A birdlike creature, about the size of a ten-year-old child, with soft down in hues of yellow and green. With flipperlike wings that ended in slender clawed hands. An unique trait that the Tseetsk is a pheromonal defense mechanism called the 'stink'. When threatened, a Tseetsk can produce a scent that can attack the sensory input centers of the victim's brain.