Birds of a Feather Flock Together
Dios los hace y ellos se juntan
This expression reminds us that those who are alike usually stay together. Those who have same interests always hang out together.
This 2000-year-old expression comes from the Bible. Those who liked to observed birds noticed that birds with the same kind of feathers (birds of the same species) were always together in flocks (groups of animals) not only in the air but also on the ground. This meaning has been broaden to comparing birds with people and feathers with their traits.