Drawing of a gray rat nibbling on some straw. This vintage, public domain rat image depicts a rat that is neither menacing or overly cute which makes it a great image for just about any occasion.
This vintage illustrator and a number of others were drawn by Joseph Martin Kronheim (1810-1896) for My First Picture Book.
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.