Centaur-like with four legs and four small arm-like appendages. Two pouches, on each side of the female's forebody contain one or two miniature husband-males, but at least one male is expelled when offspring is deposited for brooding.

Three eyes form a triangle atop a snout at the end of a very flexible neck. Urs are obligate carnivores, though they accept cultured or synthetic flesh, if raw. Free water is unusual on their homeworld, Urchachka and as a result Urs are physiologically hydrophobic. They have a very short lifespan, around thirty Earth years. Active traders. Uplifted by the Som.

Also known to live on Jijo.

Sources: Contacting Aliens, An Illustrated Guide to David Brin's Uplift Universe, New Uplift Trilogy, GURPS Uplift,