Three of the highest priority Invasive Non-native Species (INNS) in one frame.
Japanese knotweed (left), Himalayan balsam (foreground) and giant hogweed (right) all share a predilection for ungrazed riparian areas. Between them, they leave little room for native plants and present a real challenge for those using riverbanks for access, whether fishermen or families out for an afternoon stroll.
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