What bird Leaving egg in other nest?

The bird known for leaving its eggs in other birds' nests is called a "brood parasite." The most notable example of this behavior is the cowbird, which lays its eggs in the nests of other bird species. When the cowbird chicks hatch, they often outcompete the host's chicks for food and care, leading to the host bird raising the cowbird young instead of its own. This strategy allows the cowbird to save energy on parenting while ensuring the survival of its offspring.