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Horizon scanning

Hazard identification is used to identify new non-native species threats.  In GB it is provided by horizon scanning undertaken by the Defra funded Non-native Species Information Portal project.

Latest horizon scanning results 

A horizon scanning exercise conducted in 2019 identified the top 30 non-native species likely to become invasive in Britain over the next ten years:

  • Aedes albopictus, Tiger mosquito
  • Aedes japonicus, Asian bush mosquito
  • Agrilus plannipennis, Emerald ash borer
  • Ambrosia trifida, Giant ragweed
  • Anoplophora chinensis, Citrus long-horned beetle
  • Anoplophora glabripennis, Asian longhorn beetle
  • Asterias amurensis, Northern Pacific seastar
  • Baccharis halimifolia, Sea mrytle
  • Bellamya chinensis, Chinese mystery snail
  • Celtodoryx ciocalyptoides, Sponge
  • Cephalothrix simula, Nemertean worm (no common name)
  • Corbicula fluminalis, Clam
  • Gyrodactylus salaris, Salmon fluke
  • Halyomorpha halys, Brown marmorated stink bug
  • Hemigrapsus sanguineus, Asian shore crab
  • Homarus americanus, American lobster
  • Ips typographus, European spruce bark beetle
  • Mnemiopsis leidyi, Comb jelly
  • Mulinia lateralis, Dwarf surf clam
  • Myriophyllum heterophyllum, Twoleaf water milfoil
  • Neogobius melanostomus, Round goby
  • Nyctereutes procyonoides, Raccoon dog
  • Ocinebrellus inornatus, Japanese oyster drill
  • Procambarus fallax, Marbled crayfish
  • Procyon lotor, Raccoon
  • Psittacula eupatria, Alexandrine parakeet
  • Sicyos angulatus Oneseed, bur cucumber
  • Tamias sibiricu, Siberian chipmunk
  • Thaumetopoea pityocampa, Pine processionary moth
  • Vespa velutina, Asian hornet

Further information

This list built on a previous horizon scanning exercise conducted in 2014 (external link) and two previous reports that helped to identify longer lists of horizon scanning: