as First = not all users have a fast Internet access , therefore, the image should be posted smaller, so many users
who have some interest in your picture but do not want to have long load times, can see your picture

furthermore, I agree fully with the utterance of dragonshade
although I still have to ask why you have not taken a photo of a real owl as a motive ?
well, copying other pictures helps a bit - but that empathizing with a living or photographed image brings to
my mind a lot more for the artist = it creates a kind of connection and identification between subject and artist ,
at least it's me so