Birds of a Feather Flock Together
Dios los hace y ellos se juntan

Google images, «Birds of a feather…» Click on the picture to watch an episode of the series Birds of a Feather.
Meaning:
This expression reminds us that those who are alike usually stay together. Those who have same interests always hang out together.

Google images, «Birds of a feather flock…» Click on the picture to watch the video of the song «Birds of a feather»
Origin:
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.

Google images, «Birds of a feather flock…» Click on the picture to hear the poem «Birds of a feather»
Example:
I’m truly enjoying the design and layout of your website. It’s a very
easy on the eyes which makes it much more enjoyable
for me to come here and visit more often. Did you
hire out a developer to create your theme?
Excellent work!