116 days to go to Insect Week
The National Botanic Garden of Wales is a 568-acre Garden, with the Great Glasshouse as its centrepiece, which opened in May 2000. The Garden is dedicated to the research and conservation of biodiversity and its sustainable utilization, to lifelong learning and to the enjoyment of the visitor.
There are lots of contenders here – possibly the pretty red and blue rove beetle Paederus – very, very tiny amounts of its poison have been used to cure chronic ulceration in people. Ladybirds are pretty poisonous (and pretty) and can bleed foul-tasting poisonous brightly coloured blood from their knees.