Vespa bicolor, the black shield wasp, described by Johan Christian Fabricius in 1787, is a species of hornet which has been found to be the pollinator of an orchid,[1] Dendrobium sinense (syn.

Dendrobium christyanum), found only on the Chinese island of Hainan.

Vespa bicolor also preys on honey bees, which it feeds to its larvae.

The orchid produces a chemical that mimics a honey bee pheromone and attracts this predatory wasp.

Vespa bicolor is the most common species of large wasp in Hong Kong, along with members of the genus Parapolybia.