Rhododendron Leafhopper Graphocephala fennahi

This tiny hitchhiker arrived in Britain during the 1930s and has been quietly spreading across Europe ever since, likely hidden in ornamental plant shipments. It feeds on rhododendron sap and potentially spreads a fungal disease that damages these prized plants. The real kicker: global plant trade created the perfect highway for this pest and its pathogen to reach new continents. One leafhopper traveling in a garden plant shipment can establish entire populations—proving that invasive species don't always need dramatic long-distance journeys, just regular garden commerce.