English: 1=this picture bases on http://www.mangoverde.com/birdsound/picpages/pic189-82-2.html photograph1, http://www.birdwatch.ph/html/gallery/sbcrow.html photograph2,http://www.worldwildlifeimages.com/birds/v/Crows-Jays/Corvus/Corvus+enca/Corvus+enca+pusillus+_Slender-billed+_Palawan_+Crow_+03+_c_+Pete+Morris+_WorldWildlifeImages_com__001.JPG.html photograph3, http://www.mangoverde.com/birdsound/picpages/pic189-82-1.html photograph4 paper, watercolor, black ink, pencil, photoshop