Birds of a feather is an idiomatic expression used to describe a group of people who share similar interests, attitudes, and qualities. There are many synonyms for this phrase, including like-minded, kindred spirits, peas in a pod, birds of the same feather, and cut from the same cloth. Other synonyms include similar souls, simpatico, birds of a like mind, birds of the same flock, and birds of the same plumage. These expressions all convey the idea that people who share characteristics and preferences are likely to flock together, just as birds of the same species tend to gather in flocks.