fly collecting pollen from a purple cornflower wildflower

animal arthropod bee biodiversity bloom blooming blossom blue botanical botany bouquet bug centaurea cornflower cornflowers cyanus ecological environment evolution flies flora flower garden herb hoverflies hoverfly insect insects knapweed leaf meadow metamorphosis mimic nature nectar outdoors petal pied plant pollen pollinator pyrastri scaeva segmented species spring syrphid syrphidae wild wildflower wildlife