This video says about itself:
Paper Wasps Get Tiny Backpacks for Study on Animal Altruism | National Geographic
22 March 2018
New research shows wasps have their own way of communicating to each other about mealtimes — drumming on their gaster (or abdomen) to let each other know that there’s food nearby. For nearly five decades, researchers thought the gastral drumming was a signal of hunger. These findings are the first evidence that wasps have complex communication about food, just as ants, bees, termites, and other social insects: here.