Hi-I didn't find any info on this. I have a very small balcony, and baldfaced hornets keep flying into it and directly at the people on it. I think they're looking for a place to nest, and there is a lot of competition for nesting sites. I can't use the balcony and the hornet trap I made didn't work. I try to spray them with hornet spray but they're too fast. A hornet is there hovering or flying around the balcony whenever there is daylight, no exaggeration. There are no active nests there right now. There are many many trees nearby so I have no idea where active nests may be. Pleeeease help!