Find out how plants like mistletoe and hayrattle extract resources from their hosts and how hayrattle engages in a game of rock, paper, scissors, that makes managing meadows a whole lot easier. Around half of the species on our planet are parasites. Plants can play this game, being either partially or fully parasitic on their hosts. Find out how plants like mistletoe and hayrattle extract resources from their hosts and how hayrattle engages in a game of rock, paper, scissors, that makes managing meadows a whole lot easier.