The Asian giant hornet (Vespa mandarinia), including the subspecies Japanese giant hornet (Vespa mandarinia japonica), colloquially known as the yak-killer hornet, is the world's largest hornet, native to temperate and tropical Eastern Asia. Its body length is approximately 50 mm (2 in), its wingspan about 76 mm (3 in), and it has a 6 mm (0.24 in) stinger which injects a large amount of potent venom.
http://en.wikipedia.org/wiki/Asian_giant_hornet
Attack of the Japanese Giant Hornets- National Geographic Video
Cameramen Alastair MacEwan attempts to capture unprecedented footage of the deadly Japanese Giant Hornets as they attack and decimate a hive of European Honeybees.
http://natgeotv.com/uk/nature-uncut/videos/attack-of-the-japanese-giant-hornets
Hornets From Hell - Bees Develop Secret Weapon Against Hornets - National Geographic Video
They can kill forty bees a minute. A small gang can lay waste to an entire bee colony leaving thousands of severed heads and wings in their wake. They're the Hornets from Hell!
WITHIN NATURE’S INTRICATE WEB OF CHECKS AND BALANCES … THERE IS A PLACE FOR ‘PAY BACK’. Watch this video to see the amazing way Japanese Bees protect themselves
http://video.nationalgeographic.com/video/animals/bugs-animals/bees-and-wasps/bees_vs_hornet/
Killer hornets: Watch firefighters fight back against deadly insects as death toll rises to 42 and 1,600 are injured
http://www.mirror.co.uk/news/world-news/killer-hornets-see-first-pictures-2327613#ixzz2sEWarpHL