Sparrows and Circles

Here is a little sparrow sketch that I did a long time ago. Having had a browse on Etsy and Folksy for some inspiration to fill some new photo frames in my living room I decided to revisit some of my old sketchbooks and stumbled across this.
It's been a long time since I spent time playing around with illustrator and having some screen printing ideas in mind I started having a play. For some reason I tend to favour using circles in my work so there seems to be a theme here.