Otto Lilienthal published Birdflight as the Basis of Aviation in 1889 after years of studying wings and birds. The book combined measurement, theory, and practical conclusions for glider builders. It became one of the most important aeronautical works read by later pioneers.

Lilienthal's title itself reveals the poetic force of the bird as teacher and emblem. His work kept nature at the centre of technological modernity, a tension that mattered deeply to writers responding to machines.