During the winter months, the sight of a flock of Waxwings descending on a berry-laden shrub is one of nature's most energetic displays. At the Rouge River Bird Observatory (RRBO), we have observed how these social birds—both Cedar Waxwings (Bombycilla cedrorum) and their larger cousins, Bohemian Waxwings—play a crucial role in our local ecosystem through their unique dietary habits.
Master Fruit-Eaters of the North
Waxwings are specialized frugivores, meaning fruit makes up the vast majority of their diet, especially when insects are scarce. Their digestive systems are remarkably efficient at processing sugary berries, allowing them to survive periods of extreme cold that would grounded other species. This specialized diet is also why you might find unusual "droppings" in your yard; these are often filled with undigested seeds, making Waxwings one of the most effective seed dispersers in the Great Lakes region.
Field Notes: The Fermented Berry Incident
One of the more interesting phenomena we track at RRBO is the accidental "intoxication" of Waxwings. Occasionally, late-winter berries begin to ferment on the vine. We once received a report of a dozen Cedar Waxwings appearing disoriented after feeding on a crabapple tree in Dearborn. By documenting these events, we can help educate the public on the importance of planting a variety of native shrubs that provide safe, non-fermented food sources throughout the entire winter season.
Supporting Waxwings in Your Backyard
To attract these beautiful, masked birds to your garden, consider planting high-value native shrubs such as:
- Serviceberry (Amelanchier): A summer favorite that provides early energy.
- Winterberry (Ilex verticillata): Vital for late-winter survival when other foods are gone.
- Native Crabapples: A reliable source of bulk calories for large flocks.
By providing these natural food sources, you are helping Waxwings maintain the high energy levels they need for their nomadic winter wanderings. Your sightings help us at RRBO map the movement of these flocks across the Michigan landscape.
Warmly,
Dr. Sarah Jenkins
Director, Rouge River Bird Observatory