European Starlings regularly adorn their twig nests with marigolds, elderberry flowers, yarrow leaves, and even willow bark — all of which are full of aromatic chemicals, which fumigate their nests and are thought to discourage pests and parasites. Scientists discovered that starlings hatched in well-fumigated nests tend to weigh more, and live longer, than those raised without fragrant herbs. Learn more at BIrdNote.org.