8k, photorealistic, hyper detailed,BL1He13, a Black-headed Bunting on a sunflower stalk in a sunlit wheat field. It has a glossy black head, glowing yellow underparts, chestnut-brown upperparts, and neatly patterned wings. The midday sun highlights its vivid colors. Background is a golden-green bokeh of summer fields. Bright, realistic, sharp focus.