Hover-Worms were large worm-like predators which suspend themselves above the ground with jets of air issuing from ducts on their underbellies. Hover-Worms attacked with sucker-tipped tentacles protruding from their mouth. The suckers administered a lethal vemon which transformed into hot air inside the injected body. This caused the unfortunate victim to swell, start floating and eventually explode, unless an antidote of Charlock and Hempleaf was immediately administered.
Hover-Worms were very similar to Logworms, which hovered above the ground in the same way.