Kreech
From Tardis Wiki, the free Doctor Who reference
The Kreech are a giant insectoid species from the planet Usunru in Galaxy 57, who live in nests, sometimes hollowing out large trees to use as a base. They are led by a Brainleader, one super intelligent Kreech that is only born in every 10 generations. The Brainleaders purpose is to guide and support the colony without whom the Kreech would struggle to survive. The lifespan of a Brainleader is at least 10 generations longer than normal Kreech.
