Animalia Fera, Si Facta Sint Mansueta Et Ex Consuetudine Eunt Et Redeunt, Volant Et Revolant, Ut Cervi, Cygni, Etc, Eo Usque Nostra Sunt, Et Ita Intelliguntur Quamdiu Babuerunt Animum Revertendi

Definition and Citations:

Wild animals, if they be made tame, and are accustomed to go out and return, fly away and fly back, as stags, swans, etc., are considered to belong to us so long as they have the intention of returning to us. 7 Coke, 10.