Pencil Studies for a Series of Bird Portraits

As of today, I have completed 29 small pencil drawings in preparation for painting a series of bird portraits. Each square is roughly 2 1/2" square - allowing for a quick study of each bird, noting shapes, values, angles, etc.

Most of the birds are quite common, at least in the places I have lived over the years.

Note: the common name for each bird is noted below the drawing. I've begun to plan the actual layouts on the stretched canvases and consider the type and color backgrounds for each as I go along.