La Châtre
During his career, he continued and developed an ornithological collection that was initiated by his father, a collection that eventually grew to 6000 items. Baillon's collection (birds only) is now conserved in "Musée George Sand et de la Vallée noire" in La Châtre. In addition to birds from France, it contains exotic specimens from French voyages of exploration, notably birds from the expeditions of Jacques Labillardière and Jules Dumont d'Urville.