the caterpillars will feed on. once a common plant the devil s bit scabious is now sketch in this region. only here in the greenhouse is it found in abundance. this year it helped three hundred butterflies to develop. but how will they fare in nature. to test that the butterfly research is taking fifty females and fifty males on a journey. they travel ninety kilometers through lots of greenery but the butterfly couldn t survive here. as this it s just green there s nothing in bloom it s