Yeah...Several covered the basics about it above...If you've got these in your yard, make sure nobody(such as any kiddos) go barefoot around your place as the sting is quite painful if they step on them....
I'm not going to look it up but there was a YouTube video where a guy took a sting from one to "rate" it(He also took stings from other insects and rated those too)....
I had a "season" or two where there were a few in my back yard....But never anything lasting....