1、Erythrism is a rare genetic condition that causes animals to have red or reddish-brown fur or feathers.
红斑病是一种罕见的遗传病，导致动物有红色或红褐色的毛发或羽毛。

2、The bird's erythrism makes it stand out from the rest of the flock.
这只鸟的红斑病使它与其他群体明显不同。