自然写实蓝色头部棕色腹部白色腹部两只成年鸟飞翔休息

natural photography, two swallows, one swallow flying with wings spread, streamlined body, dark blue and brown feathers, positioned on the left side of the frame, another swallow perched on a branch with partially spread wings, dark blue and brown feathers, positioned on the right side of the frame, branch horizontally traversing the lower part of the frame, providing a natural support point, blurred green natural background highlighting the swallows in the foreground, overall vivid and natural visual effect, conveying harmony and vitality, minimalist naturalism style, main color scheme of green and brown, natural color palette