Colorized drawing of a robin red-breast sitting on a small branch. This image is almost 150 years old yet still would make a great addition to a modern work. It was included in Little Henry and His Bird, a c1852 work published by John R. Bolles of New London, Connecticut.
This book also contained a black and white version of this bird drawing. It can be found here: robin drawing.
This image is copyright free and in the public domain anywhere that extends copyrights 70 years after death or at least 120 years after publication when the original illustrator is unknown.