Do baby birds defecate in their nests?

Yes, baby birds do defecate in their nests. To keep their nests clean, many species have adaptations such as producing fecal sacs—mucus-covered droppings that the parent birds typically remove from the nest. This behavior helps minimize odors and reduces the risk of attracting predators. Over time, as the chicks grow, they eventually leave the nest and continue to defecate away from their living area.