There is also a correlation between location of "Stylidium" species and proximity of known carnivorous species, like sundews ("Drosera"), bladderworts ("Utricularia"), the Albany pitcher plant ("Cephalotus follicularis"), and the rainbow plant ("Byblis"). While this alone does not prove that "Stylidium" species are themselves carnivorous, the hypothesis is that the association arose because "Stylidium" species and the known carnivorous plants obtain scarce nutrients using the same source, namely captured insects. Preliminary proof is given that the trapping mechanisms of two associated plants are the same (the tentacles of "Byblis" and "Drosera"), though this may be only a coincidence and further research must be done. Recent research has raised questions as to the status of protocarnivory within "Stylidium."