Royalty Free Illustration of the Da Vinci ornithopter flying machine, 3d model, climbing in sustained flight.
While the concept was a nice one, it was not built on a working knowledge of flight. Despite that fact it is appreciated for its degree of ingenuity.
This can be used in designs relating to anything involving ingenuity, invention, aspiration, and of course, Leonardo Davinci. The large size is transparent saving you the work of having to isolate the image.