Bird’s-foot Trefoil: Kennebunk Bridle Trail, Kennebunk, Maine, USA, June 2026 — One of the more interesting wildflowers of June in Southern Maine. Besides its bright yellow color, you might notice that the working parts of the flower—the stamens and stigma—are hidden inside the folded petals of the keel, along with the nectar. Only when the preferred pollinator lands in the flower, the pollinator of exactly the right size and weight, does its weight on the larger petals “open” the keel and allow access to the works. It took us generations to design a bird feeder that works on the same principle to exclude larger birds and squirrels. 🙂 And our solution is not nearly so pretty (or efficient). Notice the two keels with holes. A bit of research this morning suggests that they are most likely from tiny caterpillars feeding on the keel petals while they were still folded inside the bud. Sony a6700. Sigma 16-300 Contemporary at 112mm equivalent field of view. Aperture with macro modifications. Processed in Photomator.