birds of a feather flock together

The expression appears to have surfaced in the 16th century, allegedly a literal translation of Plato's Republic. In 1545, William Turner wrote a version of the expression in the Rescuing of Romish Fox: "Byrdes of on kynde and color flok and flye allwayes together." One can, however, also compare the expression to Ecclesiasticus (Sirach) 27:9: "Birds resort unto their like."

• "So, in London, birds of a feather must flock together, willy nilly, silk hat and frock coat must go with white gloves and brown sables, peaky blinder and “choker" must associate with crop fringed hair, ear curls, and rakish three feathered hat."

• like attracts like
• like likes like
• apple does not fall far from the tree

• opposites attract

• birds of a feather
• like two peas in a pod