VAR (MCU CU TILT DOWN TILT UP LA PAN LEFT PAN RIGHT RACK FOCUS ZOOM IN) Japanese giant hornets (Vespa mandarinia japonica) busily move about multi-story nest. They chew wood pulp (?), add to nest, look after young, groom themselves and interact with each other. Larvae and pupae visible. Sometimes army of larvae scrape at walls of nest with perfectly coordinated motions.