A pen and ink drawing attributed to Leonardo da Vinci, this sketch captures a swift in flight, showcasing the artist's interest in avian anatomy and the natural world.

This pen and ink drawing is attributed to Leonardo da Vinci (1452-1519), the celebrated Italian High Renaissance polymath. Da Vinci is well known for his anatomical studies, inventions, and artistic achievements, including the Mona Lisa and The Last Supper. His keen observation of nature and the natural world informed all his work. This sketch captures a swift in flight. The swift's wings are outstretched, and the artist uses rapid, short strokes to convey the bird's movement and the texture of its feathers. The drawing is executed with a fine pen, and the lines vary in thickness to create depth and shadow. The paper has aged to a warm, tan colour, which provides a subtle contrast to the dark ink. The swift is depicted with a focus on its aerodynamic form, reflecting Da Vinci's interest in flight and his detailed study of avian anatomy. The sketch is a study, rather than a finished work, and it provides insight into Da Vinci's working methods and his fascination with the natural world.