A genus of ASTROVIRIDAE infecting avian species and often involving extra-intestinal manifestations. The type species is Turkey astrovirus.

Synonyms: Chicken astrovirus, nephritis virus, Avian, Avian nephritis viruses, txid70793, txid1354735, Avastroviruses, astrovirus, Turkey, txid249589, Turkey astroviruses, Avastrovirus, txid336959, Avian nephritis virus, Turkey astrovirus, astrovirus, Chicken, Chicken astroviruses