Petroglyph at Mutawintji National Park (New South Wales, Australia) manually traced from public domain image at http://en.wikipedia.org/wiki/File:Mutawintji_National_Park_Petroglyph.JPG petroglyph mutawintji 國家公園 新南甘文維 岩石藝術 Mutawintji 動物
A book-illustration in linocut-style. Scenery, horse and horseman are drawn on 3 different layers to show or to hide each part separated. 雷暴 馬 騎手 接近的雷暴
This image was donated by Pearson Scott Foresman, an educational publisher, to Wikimedia Commons, and is thereby in the Public Domain. --- See http://commons.wikimedia.org/wiki/Category:Pearson_Scott_Foresman_publisher 動物 鳥 生物學 鵜鶘