Which pigeons are black and modern with copper backs?

Copper-backed pigeons and black modern pigeons. Copper-backed pigeons are highly heritable. Copper-backed pigeon is a traditional pigeon species in China. This variety was once considered extinct, but later it was found that there are still remains among the people, which is very rare, and the fine products are even rarer. This pigeon is named after its black feathers and purple arms.