From UFStarfleet Wiki
The Bourget were one of the species captured aboard the Nyrian habitat vessel encountered by USS Voyager on Stardate 50912.4.
They appear to have a caste based system. They also appear to have something of a group mind, with one triad having a core member and two dependents. Without the core member, the other two would be unable to think coherently for themselves. They would be able to bond with another member of the core gender, but they may experience significant personality changes.