Slender, stick-like animals from the rainforests of Corvan II, driven to the edge of extinction by industrial pollution and carried to safety aboard the Enterprise in New Ground.
The Corvan gilvos is a lizard-like animal with a long, thin body that looks much like a branch of the trees it lives in. It appears in the Next Generation episode New Ground. Pollution has destroyed most of the rainforest on Corvan II, and by 2368 only fourteen of the animals are left on the planet.
The Enterprise takes two of them aboard for transport to Brentalia, a protected world where endangered species are kept. Worf's son Alexander, newly arrived on the ship and in trouble at school, is fascinated by them.
During the test of an experimental soliton wave the ship is damaged and fire breaks out in the biolab where Alexander has gone to see the animals. Worf and Riker pull the boy from the wreckage, and at his pleading Riker saves the gilvos as well.