Thanks again!!
For those who are interested: here is a render of the falcon I used in my image, and below is a falcon model from Blendswap:
https://www.blendswap.com/blend/5843I opened it in Blender and exported it as OBJ, after I deleted some geometry of descriptions (sounds funny, but it was really geometry).
Unfortunately there is almost no texturing or UV mapping, but it's more detailed than the other one. Maybe a bit over the top? However, maybe I'll start texturing it...