ABSTRACT A large slab of arenaceous siltstone was collected from strata of the Gething Formation (Aptian, Lower Cretaceous) in the Peace River Canyon of northeastern British Columbia, Canada. More than 200 footprints between 2.0 and 4.4 cm in length were found on a single bedding plane within the slab. These were made by a minimum of four individuals that apparently were feeding. The footprints have an average divarication of 113° and a correlated width to length ratio of 1.26, which fall within the range encountered in birds. Divarication between digits II and IV in even the smallest dinosaurs never exceeds 100° on an average per trackway. Other characteristics support the identification of these tracks from the Peace River Canyon as having been made by birds. The new genus and species, Aquatilavipes swiboldae, is the earliest known record of bird footprints, and probably represents a primitive taxon of marsh-dwelling bird.