The grey sibia (Heterophasia gracilis) is a species of bird in the family Leiothrichidae.

It is namely present across the Purvanchal Range and western Hengduan Mountains.

Its natural habitat is subtropical or tropical moist montane forest.

References

• Collar, N. J. & Robson C. 2007. Family Timaliidae (Babblers) pp.70 – 291 in; del Hoyo, J., Elliott, A. & Christie, D.A. eds. Handbook of the Birds of the World, Vol. 12. Picathartes to Tits and Chickadees. Lynx Edicions, Barcelona.