This is a concept in the Dune book series where the fremen use bats and birds who's speech they can modify in a way that encoded any secret message they want and then they send the bird out and someone else can then catch the bird and decode it's speech to get the message. That's why in the Dune 2 movie there's a bird menagerie inside the fremen caves

Sounds based. Imagine getting Rick rolled by a bird 🤣