Azwaca

From Turtledove

The azwaca is a large stock animal native to Home and used by the Race as a foodstuff. Azwaca are also edible to humans. The Colonization Fleet brought azwaca and several other species of livestock to Tosev 3. As Earth plants were not equipped to deal with the extremely economic grazing patterns of these animals, some ecological damage resulted. This in turn led to diplomatic tensions between the Race and the various human powers that shared borders with Lizard-territory.