Those very productive mulleins were not only good as perches, but also good at attracting warblers on low bushes surrounding them as they staged before hopping on. This is what we see here. A mullein stalk is just out of the frame at left, and the warbler about ready to go to it.
Canon 7DII + 500mm f/4 II, manual exposure, evaluative metering, 1/250s., f/5.6, ISO 1600, natural light, handheld, about 80% FF, NR to the BG, repaired a couple of small holes on the leaves (content aware and/or patch tool).