junco

例句：

1. 1. The junco is a large mammal native to North America.
   美洲野牛是北美的一种大型哺乳动物。
2. 2. Juncos are known for their distinctive black and white coats.
   美洲野牛以其黑白相间的毛皮而闻名。
3. 3. Juncos play an important role in the ecosystem by eating plants and seeds.
   美洲野牛通过食用植物和种子，在生态系统中扮演着重要角色。