title: Birds don't need exercise to stay fit for epic flights.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Pennisi
mesh_terms: D025041:Animal Migration / Q000502:physiology*; D000818:Animals; D005426:Flight, Animal / Q000502:physiology*; D005777:Geese / Q000502:physiology*; D010805:Physical Conditioning, Animal / Q000502:physiology*; D010807:Physical Endurance; D010809:Physical Fitness