Wiktionary
wart-biter
n. A bush-cricket, (taxlink Decticus verrucivorus species noshow=1), once used to bite off warts from the skin
Wikipedia
Wart-biter
The wart-biter (Decticus verrucivorus) is a bush-cricket in the family Tettigoniidae. Its English and scientific names derive from the age-old practice of using the cricket to bite warts from the skin.
Usage examples of "wart-biter".
His helmet was crested with an emerald wart-biter with wings aggressively spread.