Young European edible frogs (Rana esculenta) hide in Water-lily flower and wait for insects to arrive at the flower to feed, Holland  ,  AMPHIBIANS, Anura, AQUATIC, EUROPE, FEEDING, FLOWERS, FRESHWATER, FROGS, GROUPS, hiding, HOLLAND, INSECTS, JUVENILE, Lilies, PONDS, SURFACE, VERTEBRATES, WATER, young,Invertebrates  ,  Willem Kolvoort