Eurasian Tree Sparrow original artwork, ballpoint drawing store on paper

Drawing of an Eurasian Tree Sparrow (lat. Passer montanus).
Created using ballpoint pen, and white Sakura gelly roll on Fabriano paper.
Paper store dimensions: 29.7x21cm or 11.4"x8.2"
Image size: 17x13cm or 6.6"x5.1"
This artwork is sold unframed, with certificate of authenticity.