The name and homeworld of this species are unknown.
Members of the species were much shorter than an average Human, most standing below 70 centimeters, with lifespans of many hundreds of years (though their average lifespan is unknown because all known members of the species were Jedi, who generally lived longer than ordinary members of a species). Adults of the species were characterized by sharp, elfin ears, ridges on their foreheads, tridactyl hands and (most commonly) anisodactyl feet. Their leathery skin and blood were both light green. Their sharp teeth suggested a carnivorous diet. The diet of the most famous member of the species, Jedi Master Yoda, consisted of nutrient most other beings considered disgusting.
This species resembled the Lannik species, both having a short stature, large pointed ears, and, in some cases, a topknot of hair. Whether this species was related to the Lannik is uncertain, though Yoda was at least once mistaken for a Lannik. A genetic connection between the two species was unlikely, though, because Lannik were much more humanoid and appeared to have evolved from simians, while the unknown tridactyl species had features that suggested an amphibian or reptilian ancestry.
All known members were very wise and had extraordinary Force potential. Most of them, though not all, spoke an idiosyncratic dialect of Galactic Basic Standard, utilizing nonstandard grammar and formalized sentence construction. Members of this elusive species were rarely seen in the known galaxy.