How dumb, or smart, are birds? Calling someone a birdbrain is usually meant as an insult. But many birds are quite clever. Take for example, the mockingbird.

• 鸟儿们有多不灵活还是聪明呢？叫某人鸟脑子（愚蠢）通常意味着侮辱。但许多鸟儿非常聪明。举个例子，嘲鸟。