One of my favorite garden centers has a pair of ducks that come back every year to nest. I saw them again by the water garden tank. The mama duck finally decided where to nest this year after touring several buildings. She picked the herb display. Parsley specifically. She plucked at the sage to line the nest.The nursery waits until the eggs are laid and then they move the nest, with chosen plants, to a hanging plant container so they are safe from wandering raccoons in the night.