ideal caltha palustris in the middle of meadow. hoverfly sits on yellow bloom and earn some nectar. flower flies or syrphid flies

bee biological bloom blooming bog bud buttercup caltha ditche diversity dying ecology eggshaped flower fly fresh full garden gold hornet hoverflies hoverfly insect insects inverted kingcup long lookalike loving macro marigold marsh meadow meltwater mimic moist nature palustris plant poisonous ranunculaceae syrphid syrphidae trollius volucella wasp water wildflower wildlife yellow zonaria