The T'seef are a small, annoying creature that lives on grass, moss, insects, grubs, and human trash piles. They are not aggressive unless attacked, and even then they are not dangerous unless in large numbers. Their beaks are used during mating rituals to let out off-key honking "trills" to attract a mate along with a hopping motion, somewhat like someone trying to attract attention.
They have been declared a nuisance by almost every settlement on the planet at one time or another. The only good thing about them is that they taste like chicken and are easy to kill. If their numbers are not thinned periodically they overrun their food supply and starve to death.