A 1914 lithograph by Theo van Hoytema featuring a night heron, designed as a calendar page for the month of June.

This lithographic calendar page for the month of June features a night heron, known in Dutch as a kwak. Theo van Hoytema, a Dutch artist celebrated for his mastery of lithography and his focus on natural history, produced this work as part of a series. The composition is divided into two distinct sections: a central illustrative panel depicting the bird perched on a stone, and a functional calendar grid below. The heron is rendered with careful attention to its plumage and posture, reflecting the artist's close observation of avian anatomy.

The surrounding border employs a decorative motif of repeating circular shapes, a common stylistic element in Van Hoytema's graphic work. The typography is clean and integrated into the overall design, balancing the organic form of the bird with the rigid structure of the calendar. The colour palette remains restrained, relying on muted tones that allow the subject matter to remain the primary focus. Van Hoytema's approach to this piece demonstrates his ability to merge functional graphic design with fine art illustration. His work often appeared in calendars and books, making his observations of nature accessible to a wider audience during the early twentieth century. This print captures the specific aesthetic of the period, where the influence of Japanese woodblock prints and the Art Nouveau movement informed the simplification of form and the use of flat colour planes. The inclusion of smaller bird figures within the calendar grid adds a playful, rhythmic quality to the layout, connecting the functional dates to the natural theme of the illustration.