Halin Glaucomys yana nufin rukuni na ƙananan rodents arboreal 'yan asalin Arewacin Amirka, wanda aka fi sani da squirrels masu tashi. Sunan Glaucomys ya samo asali ne daga kalmomin Helenanci "glaukos," ma'ana launin toka ko bluish-kore, da "mys," ma'ana linzamin kwamfuta ko bera, kuma yana nufin launin launin toka na squirrel. Akwai halitta guda biyu a cikin halittar Gumi: Gleuchacks sabrinus) da kuma Kudancin tashi squirrel (glauchacys volirs). Wadannan squirrels suna da wani fatar fata da ke shimfida tsakanin kafafunsu na gaba da na baya, ta yadda za su rika yawo cikin iska tsakanin bishiyoyi.