Japanese Barberry, Berberis thunbergii , is very much like the shrub Burning Bush, Euonymus alatus – it comes into its own in the fall, turning many shades of red and orange, and thus has had great appeal as an ornamental. Birds, including turkeys, grouse, mockingbirds and waxwings, find the fruit of this woody shrub irresistible, and spread the seeds far and wide – a bit too far and wide, in fact. Like Burning Bush, Japanese Barberry has escaped from cultivation and is established and reproducing in the wild so successfully that it is classified as invasive. It is a particular threat to open and second-growth forests. An established colony can eventually grow thick enough to crowd out native understory plants, reducing wildlife habitat and forage, thereby increasing pressure on native plants by white-tailed deer and other herbivores. According to Pennsylvania’s Dept. of Conservation and Natural Resources, Japanese Barberry also acts as a nursery for deer ticks, which can transmit numerous diseases.
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