A photorealistic image of a beaver wearing a construction helmet, holding tools, actively building an eco-friendly beaver dam, surrounded by lush greenery. The beaver stands on wood logs near a flowing river, creating the structure with natural materials. Soft sunlight filters through nearby trees, casting gentle shadows, realistic fur details, and a focused expression hd quality, Canon EOS realism, golden hour lighting, intricate texturing, nature photography style, immersive detail, eco-friendly aesthetics, high contrast, cinematic tones --ar 16:9  --s 750