Efrosian
- Appearance: Mammalian
- Homeworld: Efros Delta
- Biological notes
- Originally evolved in slim temperate band around equator of Efros Delta (TTN Novel: Taking Wing)
- Cultural notes
- Much longer history before reaching spacefaring age than most humanoid species due to difficult environmental conditions resulting from severe ice age throughout development (TTN Novel: Taking Wing)
- Strong oral tradition species-wide of full cultural history (TTN Novel: Taking Wing)
- Tradition developed due to environmental conditions leading to unreliable physical recording of information from generation to generation (TTN Novel: Taking Wing)