Unknown wasp-like flying insects near the ground. Almost one inch long black body Yellow waist band and red rear end Blue irridesent wings COmes out day time until mid afternoon then disappears. All are located in one general area in back yard near wild mushrooms. THis is the first time in yard ever. First arrived in mid to late Aug. Looked at many pics online and not any match. Do you know?? Margie
Without seeing at least an image of the creatures, and preferably a specimen, I can't help you. Sounds like they are solitary, though, in which case there is nothing to fear, no reason to intervene. They will be finished with nesting within a week or two, most likely. They do not stick around to defend their nests like social wasps.