The super-bugs invading Britain
FROM: North Africa; now in Wales, London and the South-East
SIZE: 12mm Can pass on malaria, which gives flu-like symptoms and can be fatal if not treated immediately
False black widow spider (STEATODA NOBILIS)
FROM: Europe; now in southern England
SIZE: 30mm Bite causes numbness and stinging, similar to wasp sting
Euro wasp (DOLICHOVESPULA MEDIA)
FROM: France; now in southern England and Yorkshire
SIZE: 35mm Sting containing 100 active chemicals is acutely painful, causing swelling and soreness which lasts 24 hours
Great spruce bark beetle (DENDROCTONUS MICANS)
FROM: Central Europe; now in Lake District and spreading rapidly
SIZE: 8mm With large jaws and insatiable appetite, can devastate forests. Not thought to harm humans
Flying ant (LASIUS NIGER)
FROM: Europe; now in southern England
SIZE: 12mm Nests in tree stumps and under pavement slabs. Can inject a natural acid in a bite causing burns
