Envision a dramatic and haunting image of a giant bat's wings spread wide, silhouetted against a dark, moonlit sky on Halloween night. The image should be in a portrait format, with the bat's wings filling the frame and the moon glowing brightly in the background. The style should be a mix of realism and abstract expressionism, with bold, expressive brushstrokes capturing the texture and movement of the wings. The lighting should be dramatic, with the moon casting an eerie glow on the wings. In the foreground, the bat's wings should be prominently featured, with intricate details on the veins and membranes. The focus points should be the wings, the moon, and the sense of drama and foreboding. Photoshop effects could include subtle misting, dramatic lighting effects, and a dark, muted color palette.