Never seen anything like that Mike, it's intense. They indeed look "established".
Things starting to come alive in Minneapolis here to. Lots of rain, but supposed to be nicer today and Saturday, I must get out with the camera.
The season of life is here. I just noticed a lot of color coming in over the last few days since we have had some warm days and rain. All that sulfur is getting eaten up by the plants making it a colorful display. Like the shot you did there