This one was a bit tricky to paint as it had to make the bird stand out from the branch. Got there in the end - just had to keep darking and lighting the branch until it looked right.
These birds breed across Canada as well as south through the western US. They are measure between 10 - 12 cm in length and weigh between 5 - 10 grams.
Wilson's Warbler measure 3.5 x 2.5 inches and is painted on 300gsm smooth Arches Watercolour paper.
Many thanks to Andy Reago and Chrissy McClarren for the reference photo.