Caballos corriendo para colorear | dibujar el planeta tierra

Black-and-white coloring page illustration of: horses running detailed. Audience: adults (relaxation), very simple (toddler) detail, realistic detailed drawing style. Pure black outlines on white background, no shading, no fill, no grayscale, no gradient. Closed shapes ready for crayon / marker. Clean printable line-art at high contrast, no watermarks. Wholesome family-friendly imagery only. No graphic content, no scary or violent themes for kids audiences. Specifically: horses running detailed. Target search intent (rendered visually, no on-image text): "dibujar el planeta tierra" (es).