title: On the mechanics and energetics of nectar feeding in butterflies.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D002080:Butterflies / Q000502:physiology*; D004463:Ecology; D004734:Energy Metabolism; D005247:Feeding Behavior / Q000502:physiology*; D007915:Lepidoptera / Q000502:physiology*; D008855:Microscopy, Electron, Scanning; D008954:Models, Biological; D009055:Mouth / Q000648:ultrastructure; D011312:Pressure