The male chooses the nesting site, bringing straw and other items to the female to make the roost. A pigeon nest starts as a loose platform of sticks and twigs. Even if trapped and displaced, a pair of pigeons will return to the same nesting area again and again. Unlike other birds, pigeons don’t clear away waste from their nestlings while in the roost. Instead, droppings in the pigeon nest mix with twigs, straw, and unhatched or broken eggs. This makes the structure sturdier and more foul-smelling over time.