Le bleu du ciel, inspired by a childhood memory of swallows in flight a symbol of freedom and migration. Winner of the Swiss Life Four-Hands Prize in 2020, the work was developed during a residency at the Villa Medici and exhibited internationally. The work draws on a subject that combines poetic imagination and scientific curiosity: the migration of swallows. It was not until the late 18th century that naturalist Georges-Louis Leclerc de Buffon challenged the ancient belief, held by Aristotle, that swallows hibernated in mud during the winter. Buffon proposed instead that they migrated to warmer regions. In the 19th century, the invention of bird ringing allowed for systematic study of migration, just as photography was emerging as a crucial scientific and documentary too. Combining image and sound, the project offers a poetic and scientific reflection on time, movement, and space, imagining the swallows’ flight as an abstract score of pauses and accelerations. Balancing formal precision with subjective narration. The swallow in flight becomes a vector of an insatiable desire for freedom, with the sky as its only horizon.