Why do blackbirds poop in there nest and take it out and drop it on the ground?

Blackbirds, like many birds, will often remove feces from their nests to maintain hygiene and reduce the risk of attracting predators or parasites. By disposing of waste outside the nest, they help keep the nesting area clean for their chicks, promoting a healthier environment as the young birds develop. This behavior is instinctive and essential for the survival of their offspring.