In Ruddy frog shell (Bursa rubeta), Wenceslaus Hollar presents a detailed etching of a shell. The colors are subtle, with soft browns and creams dominating the palette. The shell is depicted with intricate lines that highlight its texture and form.

The background is minimal, allowing the viewer to focus on the shell itself. This artwork is an etching, a printmaking technique that involves incising a design onto a metal plate. Hollar's precision in detailing the shell showcases his skill as an engraver. The dimensions of the piece are approximately 20 x 30 cm, making it a modest yet impactful work.

The etching technique allows for fine lines and delicate shading, enhancing the realism of the subject. Wenceslaus Hollar was a Czech engraver and draftsman known for his detailed botanical illustrations. This etching of the ruddy frog shell reflects the fascination with natural history during the Dutch Golden Age. An interesting fact about this work is that Hollar often created prints for scientific publications, contributing to the documentation of flora and fauna of his time.

His works are celebrated for their accuracy and artistic quality.