Unique defence mechanism against giant hornets developed by Asian honey bees.
Source : BBC.
Other parts of this documentary about Japanese giant hornets (Vespa mandarinia japonica), subspecie of Asian giant hornet (Vespa mandarinia) :
30 Japanese Giant Hornets kill 30,000 Honey Bees :
Unique Defence Of Asian Bees Against Giant Hornets :
Japanese Giant Hornet Queen :
Japanese Giant Hornets Kill Their Impotent Queen :
Japanese Giant Hornets attack Yellow Hornets :
https://www.youtube.com/watch?v=qqNqzNJVA0w
Praying Mantis vs Japanese Giant Hornet :
Japanese Giant Hornet attacks 3 inch beetle :