Hundreds of birds on a tree. Each on a nest, waiting for its eggs to hatch.
Several crows hovering the tree, hoping to find that one lucky moment where the bird would leave its eggs unguarded.
No birds ready to chase the crows away. Even when there are hundreds of them, and only a few crows. Why? For fear of their egg being the first one to be stolen by crows, before their crowd overshadows them