Birds of a feather flock together

Cultural  

1. People are attracted to others who are like themselves.

---

birds of a feather (flock together) Idioms  

1. Individuals of like character, taste, or background (tend to stay together), as in The members of the club had no trouble selecting their yearly outing—they're all birds of a feather. The idea of like seeks like dates from ancient Greek times, and “Birds dwell with their kind” was quoted in the apocryphal book of Ecclesiasticus. The full saying in English, Birds of a feather flock together, was first recorded in 1545.

---

Example Sentences

As the English proverb teaches, “Birds of a feather flock together.”

From Washington Post

The relevant proverb: “Birds of a feather flock together.”

From New York Times

Well, birds of a feather flock together.

From The Verge

‘Winged Migration’ Birds of a feather flock together, and you’ll be right there with them in this Oscar-nominated 2001 nature documentary.

From Los Angeles Times

It was Plato who warned "birds of a feather flock together".

From BBC