Here are a few illustrations I did a long time ago for a proposed book of birds. The plate above was to include Little and Chinese Egrets (you can faintly see the pencil outlines) but only the Great Egret was completed.
This plate included some of the tern species seen in South-east Asia, again not completed mainly because I couldn't find a publisher willing to sponsor the time and money to do the project. Both illustrations gouache on paper, size about 11" x 7".