helophilus trivittatus, palearctic hoverfly on the tripolium pannonicum, sea aster

abstract animal arthropod aster background bee blossom bumblebee called flooded flower fly grassland helophilus honeybee hoverflies hoverfly inhabit insect insects invertebrate lagoon male margins natural nature palearctic pannonicum petal plant pollen pollinator river salt-marsh sea seasonally tripolium trivittatus wetland wildflower yellow